Answers
The minimum number of students is 3.
Average of grouped data:The mean is a value that is used to determine the central tendency of the data and is the average or computed central value of a set of values.
The method of determining the mean of a set of data that are grouped together in several categories is known as the mean of grouped data.
A frequency table must be set across the data's frequencies in order to calculate the mean of grouped data, which makes the calculation simple.
[ Here we need to create a frequency table to solve the problem ]
Here we have
Score 10 20 30 40
No of students 6 7 8 ?
To calculate the average of the score make the table as follows
Let 'x' be the number of students that the class average over 23
Score (x) No of students(f) fx
10 6 60
20 7 140
30 8 240
40 x 40x
∑f = 21 + x ∑fx = 440 + 40x
Average of score = ∑fx/ ∑f = [ 440 + 40x ]/21+x
As we assumed the average score is 23
=> [440 + 40x ]/21+x = 23
=> [440 + 40x ] = [ 21+x ] (23)
=> 440 + 40x = 483 + 23x
=> 40x - 23x = 483 - 440
=> 17x = 43
=> x = 43/17 = 2.53 (approx 3 )
Therefore,
The minimum number of students is 3.
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Related Questions
The following sequence of steps shows why you can square binomial the short way. For each step, name the definition or property that justifies the step.
(a+b)²
a. = (a+b)(a+b)
b. = (a +b)(a) + (a+b)(b)
c. = a² + ba + ab + b²
d. = a² + 2ab + b²
Answers
Answer:
a. definition of exponent
b. distributive property
c. distributive property
d. combining like terms
Step-by-step explanation:
You want the properties that justify the steps on expanding the square of a binomial.
a. = (a+b)(a+b)The factor is repeated a number of times equal to the exponent. This is the definition of an exponent.
b. = (a +b)(a) + (a+b)(b)The first factor multiplies each term of the second factor. This is an example of the distributive property.
c. = a² + ba + ab + b²The second factor multiplies each term of the first factor. This is an example of the distributive property.
d. = a² + 2ab + b²Terms ba and ab are combined. This "collecting terms" essentially makes use of the commutative property of multiplication and the distributive property:
ba +ab = ab +ab . . . . . commutative property of multiplication
ab +ab = (1 +1)ab . . . . . distributive property
= 2ab . . . . . . . properties of integers
A rodent species has a population of 25,000 and is decreasing in size at a factor of per year
due to the increase in snake population.
a. Write an exponential model that will estimate the rodent's population.
b. Describe the meaning of "a" and "b" in the context.
c. Copy the table and complete.
X Y
0
1
2
3
4
5
bookmarks
d. Using the model in part A, how many estimated population after 10 years. Write your
answer in whole number.
Answers
The exponential model for the rodent's population is 25,000[tex](0.08)^{x}[/tex], where x is the number of years and 0.8 is the rate of decrease in population size per year.
What is an exponent?An exponent is a mathematical notation that indicates how many times a number has been multiplied by itself. It is commonly shown as a superscript next to the basic number, such as [tex]4^{2}[/tex], which equals 4 x 4 = 16.
a. The exponential model for the rodent's population is Y = 25,000[tex](0.08)^{x}[/tex], where x is the number of years.
b. The "a" in the exponential model is 25,000, which is the starting population of the rodent species. The "b" is 0.8, which is the rate of decrease in population size per year.
c.
X Y
0 25000
1 20000
2 16000
3 12800
4 10240
5 8192
d. After 10 years, the estimated population of the rodents is 2048. This is because the population decreases by a factor of 0.8 each year, so the population after 10 years is 25000[tex](0.8)^{10}[/tex] = 2048.
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Please help me with this question
Answers
Answer:
19
Step-by-step explanation:
TU is 2 inches and UV is 17 so adding them together would equal TV which is 19.
Answer: 19
Step-by-step explanation:
Because point U is found on both TU and UV, we can assume that this point is a bisector, dividing line TV into two separate lines. This essentially tells us that when we add lines TU and UV together, they will equal the length of line TV. With that being said, 2 + 17 = 19, so that is the length of TV. Hope this helps!
a clerk is wrapping two cube-shaped packages and wants to know the smallest amount of wrapping paper that can wrap each package. the edge length of the larger package is 3in. the greater than the length of the smaller package. the surface area of the larger package is 384 in^2. what is the surface area of the smaller package?
Answers
The surface area of the smaller cubical package is given S = 150 inches²
What is the surface area of cube?The formula for surface area of a cube is equal to six times of square of length of the sides of cube. It is represented by 6a2, where a is the side length of cube.It is basically the total surface area.
Surface area S = 6a² ,
where a is the side of the cube
Given data ,
Let the surface area of the smaller cube be represented as S
Now , the surface area of the larger cube L = 384 inches²
And , side length of smaller cube = side length of larger cube - 3
Now , the equation will be
Surface area of the larger cube L = 6 ( A )² ,
where A is the side length of the larger cube
So , substituting the values in the equation , we get
6 ( A )² = 384
Divide by 6 on both sides of the equation , we get
A² = 64
Taking square roots on both sides of the equation , we get
A = 8 inches
Now , side length of smaller cube a = 8 - 3 = 5 inches
So , surface area of the smaller cube S = 6 ( a )²
Substituting the values in the equation , we get
Surface area of the smaller cube S = 6 ( 5 )²
Surface area of the smaller cube S = 6 x 25
Surface area of the smaller cube S = 150 inches²
Hence , the surface area is 150 inches²
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which of the following is the probability that the insurance company will have to pay a claim of at least $4000 for a randomly selected car is: a.0.05 b.0.13. c.0.22. d.0.35. e.0.40
Answers
The probability that the insurance company will have to pay a claim of at least $4000 for a randomly selected car is 0.22. This means that out of 100 cars, the company will have to pay a claim of at least $4000 for 22 of them.
Step 1: Determine the probability of the insurance company having to pay a claim of at least $4000 for a randomly selected car.
Step 2: Calculate the number of cars out of 100 that will have a claim of at least $4000.
Step 3: Divide the number of cars with a claim of at least $4000 by 100 to get the probability.
The probability that the insurance company will have to pay a claim of at least $4000 for a randomly selected car is 0.22. This means that out of 100 cars, the company will have to pay a claim of at least $4000 for 22 of them. To calculate this probability, we first need to determine the number of cars out of 100 that will have a claim of at least $4000. Then, we divide this number by 100 to get the probability of the insurance company having to pay a claim of at least $4000 for a randomly selected car. This is a useful measure for the insurance company, as it tells them how likely it is that they will have to pay out a claim of at least $4000 for a randomly selected car.
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A 4 year-old patient, who accidentally ingests valium found in his mother's purse, is found unconscious and rushed to the ED. The child is treated by the ED physician, who inserted a tube orally into the stomach and performed a gastric lavage, removing the stomach contents. What CPT® and ICD-10-CM codes are reported?
Answers
The reported 43753, T42.4X1A, and R40.20 CPT® and ICD-10-CM codes
What is CPT® code?In order to simplify reporting, improve accuracy, and boost efficiency, doctors and other healthcare workers have access to the Current Procedural Terminology (CPT®) codes.Rationale: Gastric lavage used to treat poison ingestion is properly coded as CPT® code 43753. Gastric Lavage, Therapeutic/Intubation can be found in the CPT® Index. You can get the ICD-10-CM code for the poisoning by looking for the Valium/Poisoning, Accidental (unintentional) column in the Table of Drugs and Chemicals, which directs you to code T42.4X1-. To finish the code in the Tabular List, a seventh character is required. In light of the fact that this was the patient's first meeting, A is listed as the seventh character. The following code represents unconsciousness, which is a side effect of taking Valium. You should consult Coma R40.20 if you're looking for unconsciousness in the ICD-10-CM Alphabetic Index. The Tabular List attests to the stated unconsciousness using this code.To learn more about CPT® code, refer to:
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When given a set of cards laying face down that spell F, R, A, C, T, I, O, N, determine the probability of randomly drawing a vowel.
A. three sevenths
B. five sevenths
C. three eighths
D. five eighths
Answers
Answer:
C
Step-by-step explanation:
A,I and O are 3 vowels out of the total 8 letters in
Answer:C
Step-by-step explanation:
alice, bob, and carol play a game in which each of them chooses a real number between $0$ and $1.$ the winner of the game is the one whose number is between the numbers chosen by the other two players. alice announces that she will choose her number uniformly at random from all the numbers between $0$ and $1,$ and bob announces that he will choose his number uniformly at random from all the numbers between $\tfrac{1}{2}$ and $\tfrac{2}{3}.$ given this information carol will choose (in simplest form) to maximize her chance of winning. find .
Answers
Carol should decide on the average of the two anticipated numbers. She must thus decide to select [tex]\frac{13}{24}[/tex].
Probability is an area of mathematics that examines the possibility that a particular event will occur. In most cases, the probability values for the specified experiment are specified between a range of numbers. The values fall in the range of 0 and 1. A negative number cannot be the probability value. Experimental probability, also known as Empirical probability, is based on actual experiments and adequate recordings of the happening of events. For Alice's number, the anticipated value is [tex]\frac{1}{2}[/tex] and the expected value of Bob's number is [tex]0.5*[\frac{1}{2} +\frac{2}{3} ][/tex]. Carol should pick the middle between these two projected figures to increase her chances of winning. She must thus choose [tex]0.5*[\frac{1}{2} + \frac{7}{12} ][/tex] = [tex]\frac{13}{24}[/tex]. Alternatively, once we recognize that the answer lies in the interval [tex](\frac{1}{2},\frac{7}{12} )[/tex], it is straight forward that she has chosen the right number.
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Let x and y be functions of time t such that the sum of x and twice y is constant . Which of the following equations describes the relationship between the rate of change of x with respect to time and the rate of change of y with respect to time ?
a) dx/dt=2dy/dt
b)dx/dt=-2dy/dt
c)2dx/dt+dy/dt=0
d)dx/dt+2dy/dt=k,where k is a function of t
Answers
The equation describes the relationship between the rate of change of x with respect to time and the rate of change of y with respect to time is b) dx/dt = -2dy/dt.
What are equations?Two expressions joined by an equal sign form a mathematical statement known as an equation. An equation is, for instance, 3x - 5 = 16. We can solve this equation and determine that the value of the variable x is 7. It describes romantic feelings specifically in terms of four fundamental elements and their relative weights. The elements are lust, affection, trust, and emotional attachment. Age-related issues can be resolved using it. It is used to determine an object's speed, distance, and time. Issues with geometry can be resolved. Problems involving money and percentages are calculated using it.The equation describes the relationship between the rate of change of x with respect to time and the rate of change of y with respect to time is b) dx/dt = -2dy/dtWe are given that ...
x(t) +2y(t) = k
for some functions x(t) and y(t) and some constant k.
Differentiating with respect to time gives ...
x'(t) +2y'(t) = 0
x'(t) = -2y'(t) . . . . . subtract the y term
In the form used in the answer choices:
dx/dt = -2dy/dt . . . . . matches choice B
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Simplify: x100y16‾‾‾‾‾‾‾√
Answers
The simplified rational expression in this problem is given as follows:
[tex]\sqrt{x^{100}y^{16}} = x^{50}y^8[/tex]
How to simplify the rational expression?The rational expression for this problem is defined as follows:
[tex]\sqrt{x^{100}y^{16}}[/tex]
The power of power rule states that when an exponential expression is elevated to a power, the powers are multiplied.
With powers, the expression is given as follows:
(x^100y^16)^1/2.
Hence the powers of the simplified expression are given as follows:
100/2 = 50.16/2 = 8.These two powers are the powers of the simplified expression given in the beginning of the answer.
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An experiment consists of rolling a fair die (sides numbered 1, 2, 3, 4, 5, 6) and then spinning a spinner with 4 equal sections labeled “Blue”, “Red”, “Purple” and “Yellow”
Let A be the event that the number rolled is a 3 or a 4.
Let B be the event that “Purple” is spun.
Find P(A).
Answers
The probability that the number rolled is a 3 or 4 is 1/3.
What is the probability?Probability is the likelihood that a random event would happen. The probability the event occurs is 1 and the probability that the event does not occur is 0. If there is a equal chance that the event would occur or not equal, the probability value would be 0.5.
P(B) = probability that the number rolled is a 3 or 4 = (number of sides that is a 3 / total number of sides) + (number of sides that is a 4 / total number of sides)
= 1/6 + 1/6 = 2/6 = 1/3
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the property manager at a large apartment complex wants to collect a simple random sample of its tenants and use a 90% confidence interval to estimate the proportion of its tenants who have pets. of the following, which is the smallest sample size that will result in a margin of error of no more than 4 percentage points?
Answers
The minimum sample size required to ensure a margin of error of no more than 4 percentage points is 294.
A simple random sample of tenants can be used to estimate the proportion of tenants who have pets in the complex. To ensure that the margin of error is no more than 4 percentage points, the sample size needs to be calculated. The formula to calculate the sample size given a margin of error of 4 percentage points and a confidence level of 90% is:
Sample Size = (1.645/0.04)2
Plugging in the values, the sample size comes out to be 294.
Therefore, the minimum sample size required to ensure a margin of error of no more than 4 percentage points is 294.
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Error Analysis Holly was asked to estimate the solution of the system of equations.
She incorrectly said the solution is (-1, -0.5). Estimate the solution of the system by
graphing the equations. What mistake might Holly have made?
y-2x=0
y=8x+3
Answers
The solution is (-0.5, -1). The graph of the system of linear equations is attached below.
What is a linear equation?
A linear equation is one that has the highest degree of 1 possible. This indicates that there are no variables in a linear equation with exponents greater than 1. Such an equation on the graph, forms a straight line.
We are given two equations:
y-2x=0
⇒ y=2x
and y=8x+3
So,
⇒2x = 8x+3
⇒-6x = 3
⇒x = -0.5
Putting this value in y=2x, we get
y= -1
Thus, the solution is (-0.5, -1).
The graph of the system of linear equations is attached below wherein the blue line represents y-2x=0 and green line represents y=8x+3.
Holly must have got confused in the x-coordinates and the y- coordinates while writing the ordered pair.
Hence, the solution is (-0.5, -1).
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What is the probability of choosing a short straw from a bag that contains 1 short straw and 9 long straws?
A) 1/10
B) 1/8
C) 1/9
D) 9/10
Answers
Answer:
The probability of choosing a short straw from a bag that contains 1 short straw and 9 long straws is 1/10 (A).
A sample of an ideal gas is compressed and cooled as it is taken from state 1 to state 2. The given properties for the gas in the two states are: p1 = 95.0 kPa, V1 = 0.0500 m3, V2 = 0.0400 m3, T1 = 300. K, T2 = 260. K. Calculate the pressure of the gas in state 2.
Answers
The pressure of the gas in state 2137 kPa. The equation of state for a hypothetical perfect gas is known as the ideal gas law, sometimes known as the generic gas equation.
What is the ideal gas law state?
The Ideal Gas Law asserts that all gases contain the same number of molecules when they are at the same temperature, pressure, and volume (but not the same mass). In case you forgot, when the temperature and pressure are getting close to turning into a liquid or solid, the Ideal Gas law does not apply.The general gas equation, often known as the ideal gas law, is the equation of state for a fictitious ideal gas. It has a number of limitations, but it provides a decent approximation of the behaviour of numerous gases under various circumstances.An ideal gas is one for which both the volume of the molecules and the forces between them are so negligibly small as to not affect the behaviour of the gas. PV=nRTGiven data :
p1 = 95.0 kPa,
V1 = 0.0500 m3,
V2 = 0.0400 m3,
T1 = 300. K,
T2 = 260.
we know PV=nRT
P1 * V1 * T1 = P2 * V2 * T2
95 x 0.05 x 300 = P2 x 0.04 x 260
1425 = P2 x 10.4
P2 = 1425 / 10.4 = 137 kPa
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Find the value of x in the diagram. (x - 20)° (x - 10)⁰ X = 21° 42° tº 29° (x + 14)°
Answers
Answer: x = 68.5°
Step-by-step explanation:
x - 20 + 21 + 42 + 29 + x + 14 + x + x - 10 = 360°
4x = 360 + 20 - 21 - 42 - 29 -14
4x = 380 - 106
4x = 274
x = 68.5°
(the exterior angles of a polygon adds up to 360 degrees)
Answer:71
Step-by-step explanation:
Moshde runs a hairstyling business from her house. She charges $49 for a haircut and style. Her monthly expenses are $1010. She wants to be able to put at least $1,246 per month into her savings account order to open her own salon.
How many "cut & styles" must she do to save at least $1,246 per month?
Answers
The number of cut & styles that Moshde can do is 47.
How many cut and styles can she do?The total amount that Moshde can save is the difference between the total revenue and the total cost.
Amount that can be saved = total revenue - total cost
$1246 = (charge per haircut x number of hair cuts) - $1010
$1246 = ($49 x h) - $1010
$1246 = $49h - $1010
In order to determine the value of h, take the following steps:
Combine and add similar terms:
$1246 + $1010 = 49h
2256 = 49h
Divide both sides of the equation by 49
h = 2256 / 49
h = 46.04
h = 47
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Find the following angle measures.
mL EAD
mL CAB
Answers
The measure of ∠EAD = 29° and ∠CAB = 119°.
How many pairs of vertically opposite pairs are formed when 2 lines intersect?When two lines intersect, 2 pairs of vertically opposite angles are formed.
Given is the figure as attached with the question.
The measure of ∠EAD = 90 - 61 = 29°
∠EAD = 29°
∠CAB = ∠EAF = 90° + 29° = 119° {vertically opposite angles are equal}
∠CAB = 119°
Therefore, the measurement of ∠EAD = 29° and ∠CAB = 119°.
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What type of sequence is this? (2, 4, 8, 16, 32)
Answers
Answer: A factor of 2 between each number
Step-by-step explanation: 2 (*2), 4 (*2), 8, and so on...
Answer:
Geometric sequence
Step-by-step explanation:
In a geometric sequence you must multiply by a common ratio to get from one term to the next.
To get from 2 to 4, multiply by 2.
To get from 4 to 8, multiply by 2, and so on.
This means that the common ratio is 2
In right triangle ABC with the right angle at vertex C , altitude CE¯¯¯¯¯¯¯¯ is drawn from vertex C to AB¯¯¯¯¯¯¯¯ . Which similarity statement correctly relates the three triangles in the diagram?
Right triangle A B C has right angle A C B. Segment C E is the altitude to hypotenuse A B.
Responses
△ABC∼△ACE∼△CBE
△ABC∼△ACE∼△CBE
△ABC∼△AEC∼△EBC
△ABC∼△AEC∼△EBC
△ABC∼△CAE∼△BCE
△ABC∼△CAE∼△BCE
△ABC∼△ACE∼△BCE
Answers
△ABC∼△ACE∼△CBE is true according to the given data of triangles.
What is the congruent triangle?Triangles are said to be congruent if, under a correspondence, two of a triangle's sides and the angle that connects them are equal to two of another triangle's sides and the angle that connects them.
Given, ABC is a right triangle with altitude CE
Now,
In Triangle ABC and Triangle ACE
angle CAB = angle EAC
(common angle)
angle ACB = angle AEC (Right angle)
So,
Triangle ABC is similar to triangle ACE
Similarity,
For ΔABC and ΔCBE;
∠ABC = ∠CBE (common angle)
∠ACB = ∠CEB (right angle)
So,
ΔABC is also similar to ΔCBE
thus,
ΔABC ≅ ΔACE ≅ ΔCBE
Therefore, Option (a) △ABC∼△ACE∼△CBE is correct.
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Complete question:
Drag the tiles to the correct boxes to complete the pairs.
Match each data set with the value that best describes its center.
6
2
4
9
Answers
The data sets and the values that best describe the elements within the data set are as follows;
Data set A; 2, 3, 1, 4, 2, 0, 0 → 2
Data set B; 6, 4, 5, 6, 5, 7, 8, 7 → 6
Data set C: 1, 4, 0, 2, 4, 4, 6, 7 → 4
Data set D: 7, 8, 10, 11, 8, 9, 10, 9, 11 → 9
What is a descriptive statistics?Descriptive statistics is the process of providing summaries of a set of data that describes the data contained in the data set.
The descriptive statistic that can be used to find the value that best describes the data are as follows;
The mean; The average value of the data set
The mode; The most common term in the data set
The median; The data value that is at the middle of the data arranged in increasing order of magnitude
Data set A: 2, 3, 1, 4, 2, 0, 0
The mean of data set A is; (2 + 3 + 1 + 4 + 2 + 0 + 0)/7 = 12/7
12/7 = 1 5/7
The mode of the data set is; 2
The data set arranged in increasing order is; 0, 0, 1, 2, 2, 3, 4
The middle number, which is the median of the dataset is, 2
The number that best describes the data is; 2
Data set B: 6, 4, 5, 6, 5, 7, 8, 7
The mean of the data set is; (6 + 4 + 5 + 6 + 5 + 7 + 8 + 7)/8 = 48/8 = 6
The median of the numbers; 4, 5, 5, 6, 6, 7, 7, 8 is 6, therefore
The numbers with the highest frequencies in the data set includes; 5, 6, and 7
The mean and the median of the data set are both 6, therefore, the value that best describes the data set is; 6
Data set C: 1, 4, 0, 2, 4, 4, 6, 7
The mode and the median of the data set are both 4
The mean of the data is; (1 + 4 + 0 + 2 + 4 + 4 + 6 + 7)/8 = 3.5
3.5 ≈ 4
The number that best describes the data is therefore; 4
Data set D: 7, 8, 10, 11, 8, 9, 10, 9, 11
The mean of the data set is; (7 + 8 + 10 + 11 + 8 + 9 + 10 + 9 + 11)/9 = 83/9
83/9 = 9 2/9
The median is obtained as follows; 7, 8, 8, 9, 9, 10, 10, 11, 11
The middle number, therefore, the median is 9
The number that best describes the data set is; 9
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alyssa bought a bag containing 60 small candies. she starts eating the candies at a rate of 5 candies per minute. answer the questions below regarding the relationship between the number of minutes eating and the number of candies left in the bag.The independent variable, x, represents the __________ and the dependent variable is the __________ because the __________ depends on the __________. A function relating these variables is H(x) = ___.So H (10) = ___, meaning ____.
Answers
The number of candy still in the bag is the dependent variable, while the independent variable, x, stands for the length of time spent eating, as the number of candies still in the bag relies on the length of time spent eating. A function relating these variables is H(x) = 60 - 5x. So H (10) = 40, meaning there are 40 candies left in the bag.
H(x) = 60 - 5x
H(10) = 60 - 5(10)
H(10) = 60 - 50
H(10) = 10
The independent variable, x, represents the number of minutes eating and the dependent variable is the number of candies left in the bag because the number of candies left depends on the number of minutes eating. This is a linear relationship, meaning that the rate at which the candies are being eaten is constant, so the decrease in the number of candies is proportional to the number of minutes eating. A function relating these variables is H(x) = 60 - 5x. This is a linear equation, with a slope of -5, which means for every minute eating, the number of candies left decreases by 5. So, when x = 10, H(10) = 60 - 5(10) = 60 - 50 = 10, meaning there are 10 candies left in the bag. This function can be used to determine the number of candies left in the bag at any point in time.
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Write an expression for the sequence of operations described below. raise 10 to the 5th power, then add the result to 7 Do not simplify any part of the expression.
Answers
The expression which represents the given word phrase as required to be written is; 10⁵ + 7.
Which expression represents the mathematical representation of the word phrase?It follows from the task content that the expression which represents the sequence of operations described be written.
First, the word phrase says; raise 10 to the 5th power, therefore, we have;
10⁵
Finally, the word phrase says to add the result to 7; Hence, the final expression is; 10⁵ + 7.
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Which of the following conditions must be met to conduct a two-proportion significance test?
The populations are independent.
The probabilities of success multiplied by the sample sizes are greater than or equal to 10 and the probabilities of failure multiplied by the sample sizes are greater than or equal to 10 for each population.
Each sample is a simple random sample.
I only
II only
III only
I and II only
I, II, and III
Answers
A two proportion significance test must be performed and pass all parameters. Ans is true since all three requirements have been met (I, II and III). Option (e).
Given,
For the two proportion significance test, the following assumptions were met: The populations are independent. (Populations exist in distinct groups.) The sample size multiplied by the success probability for each population is more than or equal to ten, as is the sample size multiplied by the failure probabilities. (We look at this normality criterion; if it holds true, we say that the data is roughly normally distributed.)
Every sample is chosen randomly. (The sample must be selected at random; else, bias may occur.) A two-proportion Z-test is a statistical hypothesis test that determines whether two proportions are different from one another. Two independent samples are used in the test, and Z-statistics are calculated with the null hypothesis that the two proportions are equal.
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Shorts that regurlarly sell at 175 are sold for 131.25 determine the discoun and rate of discount
Answers
Answer:
25%
Step-by-step explanation:
Discount is 175 - 131.25 = 43.75
Rate of discount = 43.75/175 x 100 = 25%
The area of one of the bases of the figure shown above is about 6.9 cm^2. What is the surface area?
Answers
Answer:
Step-by-step explanation:
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Solve the equation 0 = 22² - 8x + 10.
Select all the correct answers.
= 2
= 2-i
x = 1
== -2
Ox=2+i
Oz=1-i
x = -1
Oz = 1+i
Answers
The roots of the given quadratic polynomial are-
x = 2 - ix = 2 + iWhat is meant by the term roots of polynomial?The values of such a variable where the provided polynomial equals zero are referred to as a polynomial's roots. P(a) = 0 if an is the polynomial's root for x. A polynomial's root or zero is the value(s) for X that make the polynomial equal zero (or make Y equal zero).The given quadratic polynomial is:
0 = 2x² - 8x + 10
Comparing with the general equation: ax² + bx + c = 0
a = 2, b = -8, c = 10
Using quadratic formula.
x = -b ± √(b² - 4ac) / 2a
x = 8 ± √(8² - 4*2*10) / 2*2
On solving.
x = 2 - i
x = 2 + i
Both roots are imaginary numbers.
Thus, the roots of the given quadratic polynomial are-
x = 2 - ix = 2 + iTo know more about the roots of polynomial, here
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A local charity holds a carnival to raise money. In one activity, participants make a $3 donation for a chance to spin a wheel that has 10 spaces with the values, 0, 1, 2, 5, and 10. Whatever space it lands on, the participant wins that value. Let X represent the value of a random spin. The distribution is given in the table.What is the probability that the value is 0?0.20.40.50.6
Answers
Answer:
The first option (1)
Step-by-step explanation:
Because i am always right and i know how to do math :) .
Your welcome
Mai is playing a game of chance in which she rolls a number cube with sides numbered from 1 to 6. The number cube is fair, so a side is rolled at random.
This game is this: Mai rolls the number cube once. She wins $1 if a 1 is rolled, $2 if a 2 is rolled, $3 if a 3 is rolled, and $4 if a 4 is rolled. She loses $6.50 if a 5 or 6 is rolled.
(A) She gains __ per roll
(B) She loose __ per roll
(C) She neither gains or looses
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The correct option regarding the expected value of her game is given as follows:
B. She looses $0.5 per roll.
How to obtain the expected value of a discrete distribution?The expected value of a discrete distribution is calculated as the sum of each outcome multiplied by it's respective probability.
As each outcome is equally as likely, the distribution of earnings for her game is given as follows:
E(X = 1) = 1/6.E(X = 2) = 1/6.E(X = 3) = 1/6.E(X = 4) = 1/6.E(X = -6.5) = 2/6.Hence the expected value for the game is of:
E(X) = (1 + 2 + 3 + 4) x 1/6 - 6.5 x 2/6
E(X) = -$0.5.
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An indoor soccer field can be rented for personal use. The total cost for renting the field can be found by using the equation y = 225x + 200. The x-variable is the number of hours the field is being rented, the constant is the flat rate for renting the field, and the y-variable is the total cost, in dollars.
Which statement is true based on the given equation?
The equation shows a linear relationship, but not a proportional relationship.
The equation shows a linear relationship and a proportional relationship.
The equation does not show a linear relationship or a proportional relationship.
The equation shows a proportional relationship, but not a linear relationship.
Answers
Answer: it would be (A)
The equation shows a linear relationship, but not a proportional relationship.
let me know if it helped
Answer:
it would be (A)
Step-by-step explanation:
