Omg please answer this!! I really need help. Evaluate (8+t)^3 - 6 when t =2.

Expression that can be used to find -6.3 x -4.2 are

(1): -4.7 - 2.3x + 0.5 - 4x

(2):-5.3x-4.2-x

(3):-3.4-6.3x-0.8

Expression can be defined  as a sentence with a minimum of two numbers or variables and at least one math operation. This math operation can be addition, subtraction and multiplication

By Collecting like terms and adding the answer I get -6.3x - 4.2

(1):-4.7-2.3x+0.5-4x

Collect like terms

-2.3x-4x-4.7+0.5

-6.3x-4.2

(2):-5.3x-4.2-x

Collect like terms

-5.3x-x-4.2

-6.3x-4.2

(3): -3.4-6.3x-0.8

Collect like terms

-6.3x-3.4-0.8

-6.3x-4.2

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The option are:

-4.7 - 2.3x + 0.5 - 4x

-5.3x - 4.2 - x

-3.4 - 6.3x - 0.8

-6.2x - 4.2

-4.2x - 6.3

-3.7 - 5.3x + 0.5

multiple choice

The square centimeters of the cylinder did Mariah paint in terms of π will be 24π cm².

Let r be the radius and h be the height of the cylinder. Then the surface area of the cylinder will be given as,

SA = 2πrh square units

Mariah made a cylinder out of clay that had a radius of 6 cm and a volume of 72π cm³. The height of the cylinder is calculated as,

V = πr²h

72π = π x 6² x h

72 / 36 = h

h = 2 cm

Then the surface area of the cylinder is given as,

SA = 2 x π x 6 x 2

SA = 24π square cm

The square centimeters of the cylinder did Mariah paint in terms of π will be 24π cm².

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If you solve 3x - 2y = -5 for slope-intercept form, you'd have:

     y = 3/2 x + 5/2

If you solve 3x - 2y = 8 for slope-intercept form, you'd have:

     y = 3/2 x - 4

Since the slopes are the same, but the y-intercepts are different, these lines are parallel.

The level curves of the function h(x,y) = 2x-y at c = 0, -2, 2 are y = 2x, y = 2x + 2, y = 2x - 2 respectively.

A level curve (also called a contour line or an isocline) of a function is a curve that represents all the points where the function has a constant value. To find the level curve of a function at a given value of c, we need to set the function equal to c and solve for the variables.

For h(x,y) = 2x-y, we can find the level curves at c = 0, -2, 2 by setting the function equal to c and solving for x and y:

The level curves of h(x,y) = 2x-y at c = 0, -2, 2 are the lines y = 2x, y = 2x + 2, y = 2x - 2 respectively. Each line represents a different value of c and separates the domain of x and y into different regions where the function takes on that constant value.

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Answer:  ≈ 174.01

Thus, The Sky Scraper  ≈  174.01

Step-by-step explanation:

From his eye, which stands 1.55 meters above the ground, Tyler measures the angle of elevation to the top of a prominent skyscraper to be 57∘

∘. If he is standing at a horizontal distance of 112 meters from the base of the skyscraper, what is the height of the skyscraper? Round your answer to the nearest hundredth of a meter if necessary.

1 - Draw Diagrams, Label Knowns:

Unknowns: X

2 - Identify: OPPOSITE, ADJACENT, HYPOTENUSE

3 -  WHAT FUNCTION USES THE OPPOSITE AND THE ADJACENT?

SOH - CAH - TOA

NOW SHOWING WORK:

tan 57 = opposite/adjacent =  x/112

tan 57 = x/112

tan 57/1  = x/112

112 tan 57 = x         ( Cross Multiply)

x = 172.464875    (Now, type into the calculator)

So, Now we ADD:

1.55, the distance from the ground to his eye.

172.464875  +   1.55  =  174.014875

≈ 174.01     (Round to The Nearest HUNDREDTH)

Thus, the Sky Scraper is ≈ 174.01 meters tall.

So, your answer would be :  

Sky Scraper  ≈  174.01

Hope I have explained it and helped you in your studies!

The height of the skyscraper is given by H = 174.01 m

Trigonometry is the study of the relationships between the angles and the lengths of the sides of triangles

The six trigonometric functions are sin , cos , tan , cosec , sec and cot

Let the angle be θ , such that

sin θ = opposite / hypotenuse

cos θ = adjacent / hypotenuse

tan θ = opposite / adjacent

tan θ = sin θ / cos θ

cosec θ = 1/sin θ

sec θ = 1/cos θ

cot θ = 1/tan θ

Given data ,

We can start by drawing a right triangle, where the horizontal distance from Tyler to the base of the skyscraper is one leg, the height of the skyscraper is the other leg, and the line of sight from Tyler's eye to the top of the skyscraper is the hypotenuse.

Then we can use trigonometry to solve for the height of the skyscraper.

Let the height above the ground from his eye = 1.55 m

Now , the angle of elevation θ = 57°

The horizontal distance from the base of the skyscraper = 112 m

Now , from the trigonometric relations ,

tan θ = opposite / adjacent

So , tan 57° = x / 112

Multiply by 112 on both sides , we get

x = 172.46 m

Now , the total height of the skyscraper = 172.46m + 1.55 m

So , height H = 174.01 m

Hence , the skyscraper has a height of 174.01 m

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9 students preferred learning only through videos.

Inclusion-exclusion is a principle used in counting to find the total number of elements in a union of sets by subtracting the elements that are counted multiple times and adding back in the elements that are not counted at all.

The number of students who preferred learning only through videos is 17.

This can be found by using the principle of inclusion-exclusion:

35 students liked to learn through videos

14 students liked to learn through listening and videos

5 students liked all three channels

So, 35 - 14 + 5 = 26 students liked to learn through videos and listening

Therefore, 35 - 26 = 9 students preferred learning only through videos.

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Answer:

x + 2  (Choice D)

Step-by-step explanation:

The two polynomials are
P1 = 4x² + 5x - 4  

and

P2 = 4x² + 4x - 2

P1 - P2

==>  (4x² + 5x - 4 ) -  (4x² + 4x - 2)

Expanding brackets we get

==> 4x² + 5x - 4 - 4x² - 4x + 2        (signs inside the second parentheses are    

                                                 reversed because of the - sign preceding it)

Group similar terms and add the coefficients

==> (4x² - 4x²) +(5x - 4x) +(-4 + 2)

==> 0 + x + 2

==> x + 2  (Choice D)

Answer:7

Step-by-step explanation:

The critical points, sign chart and intervals of increase and decrease is plotted for the function f(x) = x³/4 - 3x.

Critical points - (−2,4) and (2,−4)

Interval of increase - (−∞,−2)∪(2,∞)

Interval of decrease - (-2,2)

What is a function?

In mathematics, a function is a unique arrangement of the inputs (also referred to as the domain) and their outputs (sometimes referred to as the codomain), where each input has exactly one output and the output can be linked to its input.

A continuous function f with x in its domain has a critical point at that point xx if it satisfies either of the following conditions -

f'(x) = 0,

f'(x) is undefined

The given function is f(x) = x³/4 - 3x

So, f'(x) = 3x²/4 - 3

In the graph of the function, only two points are there on the graph where f'(x) = 0, which is -

(x,f(x))=(−2,4)

(x,f(x))=(2,−4)

A sign chart tells you when the value of a function f(x) is negative or positive, which is the same as when the graph of f(x) is below or above the x-axis, respectively.

Draw a solid line when the y-value of the function is greater than zero, which is when f(x)>0.

Draw a dashed line when the y-value of the function is less than zero, which is when f(x)<0.

In the graph it can be seen that the graph is below zero up to x = -3.464 and between x = 0 and x = 3.464. In these intervals the sign chart is dashed. The graph is above the x-axis between x = -3.464 and x = 0 and when x>3.464. In these areas the sign chart is solid.

In the graph it can be clearly seen that the graph is increasing from point -∞ up to -2 and from 2 to ∞.

Also in the graph it can be clearly seen that the graph is decreasing from point -2 up to 2 .

Therefore, the critical points, sign chart and intervals of increase and decrease is found.

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i. The tangent ratio for ΔRBK is 16/ 38.4

ii. The tangent ratio for ΔHMK is 8/ 19.2

Trigonometric functions are set of functions that are applicable when the side or angle of a triangle is to be determined. Some basic trigonometric functions are: Sine, Cosine, Tangent etc.

The tangent of an angle relates its opposite side to the reference angle with the adjacent side to the same angle.

So that;

Tan θ = opposite/ adjacent

In the given question,

1. From ΔRBK, the tangent ratio is given as;

tan θ = opposite/ adjacent

            = RB/ BK

but BK = BM + MK

           = 19.2 + 19.2

          = 38.4

So that;

tan θ = 16/ 38.4

2. From ΔRBK, the tangent ratio is given as;

tan θ = opposite/ adjacent

        = HM/ MK

tan θ = 8/ 19.2

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The rate of change of a function at a point is given by its derivative. To compare the rate of change of f(x) and g(x) at different points, we need to find the derivative of both functions and compare them.as explained below :

The derivative of f(x) = e^x is f'(x) = e^x

The derivative of g(x) = x^4 is g'(x) = 4x^3

Now we need to compare the two derivatives to find on which intervals the rate of change of f(x) is greater than the rate of change of g(x). To do this, we will find the point of intersection between the two functions and compare them.

e^x = 4x^3

Taking the natural logarithm of both sides we get:

x = ln(4x^3) / ln(e)

Approximating we get x ≈ 0.816 and x ≈ 1.430 and x ≈ 8.613

For x < 0.816, e^x < 4x^3, so the rate of change of f(x) is smaller than the rate of change of g(x)

For x > 8.613, e^x > 4x^3, so the rate of change of f(x) is greater than the rate of change of g(x)

Between 0.816 < x < 1.430 and 1.430 < x < 8.613, e^x = 4x^3, so the rate of change of f(x) is equal to the rate of change of g(x).

So the answer is (D) (0.816, 1.430) and (8.613)

Note that the answer (B) (0.831) and (&.384) is not possible as the point of intersection is a number and not an interval and the answer (A) (0.831, 7.384) is not correct as the point of intersection is 1.430 and 8.613 not 0.831 and 7.384

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Hong rode the scooter for 61 minutes.

What is the algebra?

Algebra is a branch of mathematics that deals with mathematical equations and their properties. It is a way to represent and solve problems using mathematical symbols, letters and numbers.

We can use algebra to solve for the number of minutes Hong rode the scooter. Let x be the number of minutes Hong rode the scooter.

We know that the total bill is the sum of the start fee and the per-minute fee.

So, we can set up the equation as:

Total bill = start fee + per-minute fee

In this case:

10.88 = 6 + (x * 0.08)

We can then solve for x by isolating it on one side of the equation:

10.88 = 6 + (x * 0.08)

10.88 - 6 = x * 0.08

4.88 = x * 0.08

x = 4.88 / 0.08

x = 61

So, Hong rode the scooter for 61 minutes.

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The results of the x-intercept and y-intercept results from above (39.5, 0) and (x1, y1) and (x2, y2) (0,26.333)

2x + 3y = 79

2x + 3(0) = 79

x1 = 39.5 y1 = 0

the y-intercept

Where the graph crosses the y-axis is known as the y-intercept. We first solve for y before setting x2=0 to determine the y-intercept.

2x + 3y = 79

2(0) + 3y = 79

y2 = 26.333

x2 = 0

To draw a straight line on a graph, you must get two graph points. The format for the plot coordinates is (x1,y1) and (x2,y2).

Thus, we can obtain the graph plots for 2x + 3y = 79 as follows using the results of the x-intercept and y-intercept results from above:

(39.5, 0) and (x1, y1) and (x2, y2) (0,26.333)

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The blanks in the equation are filled as below

5 1/8 = 4 + 1 + 1/8 = 4 + 1/8 8 + 1/8 = 5 1/8

To fill the blanks the equation is written completely in figures

5 1/8 = 4 + 1 + 1/8 = 4 +   8 + 1/8 =  

From the knowledge of equality to maintains a true equation the last blank should be equal to 5 1/8.

With this information, we use addition operation to solve for the first blank as follows.

let the first blank be x

4 +   8 + 1/8 = 5 1/8

4 + x * 8 + 1/8 = 5 1/8

4 + 8x + 1/8 = 5 1/8

collection like terms

8x = 5 1/8 - 4 - 1/8

8x = 1

divide both sides by 8

x = 1/8

the blanks are 1/8 and 5 1/8

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Answer:11/12

Step-by-step explanation:

Answer:

h = 18 in.

Step-by-step explanation:

Both safes are in the shape of a rectangular prism

The volume of a rectangular prism = L X w X H

where L = length, W = width and H = height

Safe A has volume 18 x 15 x 24

Safe B has volume 20 x 18 x h

Both volumes are equal and we have to find h

Equating both expressions

20 x 18 x h = 18 x 15 x 24

Dividing by 18 on both sides will get rid of the 18 in the product

(20 x 18 x h)/18 = (18 x 15 x 24)/18

20h = 15 x 24

20h = 360

h = 360/20

h = 18 in.

The least certain measurement determines the certainty of the answer.

What guidelines apply when rounding sig figs?

(1) The final digit that is preserved is raised by one if the digit to be eliminated is greater than 5. As an illustration, 12.6 is rounded to 13.

                                      (2) The last digit that remains is left alone if the digit to be dropped is less than 5. As an illustration, 12.4 is rounded to 12.

Which of the following statements best describes the significant figures rule?

Use the following 3 principles to calculate how many significant figures are present in a number: The significance of non-zero digits is constant.

                                   A significant zero is one that comes in between two significant digits. ONLY the decimal part has any significance when there is a final zero or trailing zeros.

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The shape of the bases for the following polyhedron depend on the type of polyhedron. For example, a triangular prism would have triangular bases, a square pyramid would have square bases, a rectangular prism would have rectangular bases, and a cone would have circular bases.

The shape of the bases for a polyhedron depend on the type of polyhedron. Polyhedra can have a variety of shapes, such as triangular, square, rectangular, and circular. For example, a triangular prism would have triangular bases, a square pyramid would have square bases, a rectangular prism would have rectangular bases, and a cone would have circular bases.

The shape of the bases for the following polyhedron depend on the type of polyhedron. For example, a triangular prism would have triangular bases, a square pyramid would have square bases, a rectangular prism would have rectangular bases, and a cone would have circular bases.

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Population Mean is the statistical indicator to its designation or nomenclature.

Therefore,

The formula for the population mean, which is the population's average score on a certain variable, is:  μ = ( Σ Xi ) / N. The population mean is represented by the symbol "."

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Answer:

19(42 + 58)

Step-by-step explanation:

19(100)

1900

The weight gains of beef steers were measured over a 140 -day test period .then mean is 3.545 and median is 3.435

Given

3.89 3.51 3.97 3.31 3.21 3.36 3.67 3.24 3.27

mean = 3.89+3.51+3.97+3.31+3.21+3.36+3.67+3.24+3.27 /10

= 35.45/10

= 3.545

average is the sum of all terms present in the question divided by the number of terms that is the way of calculating average

Solving (a): The mean = 3.545

This is calculated as:

median = 10+1 /2 term

 = 11/2

=5.5 term

So, we have:

median = 3.435

The weight gains of beef steers were measured over a 140 -day test period .then mean is 3.545 and median is 3.435

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Answer: [tex]\triangle TUS \cong \triangle QRP[/tex]

Step-by-step explanation:

When naming congruent triangles, corresponding vertices must have the same positions in the names of the triangles.

The three true statements are:

The standard form of the equation is (x – 1)² + y² = 3.

The center of the circle lies on the x-axis.

The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.

What is the center of the circle?

A circle is named by the point in the center. A radius is a line segment from the center of the circle to the edge. A diameter is a line segment that passes through the center of a circle.

The true statements are:

The standard form of the equation is (x – 1)² + y² = 3.

The center of the circle lies on the x-axis.

The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.

Given an equation of x2 + y2 – 2x – 8 = 0, we can make the following observations:

We can complete the square to get the equation in standard form. (x – 1)² + y² = 3². This is true statement.

The center of the circle is (1,0) which is on the x-axis, this statement is true.

The radius is 3 units, which is the same as the radius of the circle x² + y² = 9 (3²). This statement is true.

The center of the circle does not lie on the y-axis as its x-coordinate is not 0.

Hence, The three true statements are:

The standard form of the equation is (x – 1)² + y² = 3.

The center of the circle lies on the x-axis.

The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.

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There were 50 single tickets sold and 40 couples tickets were sold.

The equation is defined as mathematical statements that have a minimum of two terms containing variables or numbers that is equal.

Let's call the number of single tickets sold "x". Then the number of couple tickets sold would be "y".

We know the total number of attendees is 130, so we can write the equation:

x + 2y = 130

We also know that the total revenue from the ticket sales is $24,000, so we can write another equation using the cost of the tickets:

200x + 350y = 24,000

We now have a system of two equations that we can solve for x and y then we get the values are:

x = 50 and y = 40

So, 50 single tickets were sold and 40 couples tickets were sold.

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The normalized input admittances are the inverse of the normalized input impedances and can be found on the Smith Chart.

The Smith Chart is a graphical tool used to quickly calculate the reflection coefficient, impedance, admittance, and other characteristics of a transmission line. To find the normalized input admittances corresponding to the normalized input impedances, we first need to find the normalized reflection coefficient for the given normalized input impedances. This can be done by locating the given normalized impedance on the Smith Chart and then determining the normalized reflection coefficient from the radial and angular coordinates. Once the normalized reflection coefficient has been determined, the normalized input admittance can be found by using the formula Y = 1/Z. The normalized input admittance is then located on the Smith Chart in the same manner as the normalized input impedance, using the radial and angular coordinates.

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Yes, BD is the bisector of ∠ABC.

Geometry is a branch of mathematics that deals with shapes, sizes, angles, and dimensions of objects.

Given is that ABC is straight angle. BD is drawn so that two adjacent angles are created. It is given that  m ∠ABD = 22x - 9 and m∠ CBD = 4x + 7.

For BD to be the bisector of ∠ABC, ∠ABD and m∠ CBD should be equal. So  we can write -

22x - 9 = 4x + 7

22x - 4x = 16

18x = 16

x = 8/9

Now, we can write -

m ∠ABD = 22x - 9 = 22 x 8/9 - 9 = 10.55°

m ∠ABD = 10.55°                                                    ...... (1)

m ∠CBD = 4x + 7 = 4 x 8/9 + 7 = 10.55°

m ∠CBD = 10.55°                                                    ...... (2)    

m ∠ABD = m ∠CBD                                                

Yes, BD is the bisector of ∠ABC.

Therefore, yes, BD is the bisector of ∠ABC.

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The probability of a random variable X with a uniform distribution being greater than 0.49 can be calculated using the formula P(X > 0.49) = 1 - P(X ≤ 0.49).

Since X has a uniform distribution, it means that the probability of any number between 0 and 1 occurring is the same. Therefore, P(X ≤ 0.49) = 0.49.

The probability of X being greater than 0.49 can be calculated using the formula for uniform distributions, which is P(X>a) = 1 - P(X≤a). In this case, P(X>0.49) = 1 - P(X≤0.49). The probability of X being less than or equal to 0.49 can be calculated by multiplying the probability of each individual outcome (since they are all equally likely) by the number of outcomes that satisfy the condition .Substituting this into the formula to calculate P(X > 0.49), we get P(X > 0.49) = 1 - 0.49 = 0.51. Therefore, the probability of a random number generated being greater than 0.49 is 0.51.

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Answer:

Step-by-step explanation:

The probability that ŕose will choose a science book first is 5/8 and the probability of the adventure book is 3/8