Mathematics Middle School

Evaluate when x = -3 and y= -1:

Evaluate when x = 3, y = -3 and z = -2:

Which numerical expression is obtained by substituting x= 2, y= 6,
and z = 3 into the expression shown? x - (y+z)

Evaluate when x = 3, y = 2, and z = 4:

Answers

Answer 1

here is the answer: so if x = 3, y =2 and z = 4 then the answer is 3 - (2+4)

Answer 2
the answer is x=3, y=0, x=4 and, y=6

Related Questions

It takes a car 2.5 h to go from mile marker 15 to mile marker 130. What is the average speed of the car?

40 points

Answers

Answer:

your answer is 46

Step-by-step explanation:

so you take 115 and divide it by 2.5

Irma works for a service that delivers groceries and pet supplies. She earns a base monthly salary of $1,900. In addition, she gets a commission of 1.8% of the cost of each grocery order, plus a fee of $11 for each delivery of pet supplies.

Part A

How is calculating Irma’s total annual earnings different from calculating earnings based on salary and commission?

Answers

irma’s annual income has the delivery fees already taken out. earnings based on salary and commission is higher becuase fees have not been taken out

Answer:

Irma also gets $11 for each delivery.

Step-by-step explanation:

Match the scale and area of each scaled object to the area of the actual object.
Tiles
scale: 1 inch to 2 feet
scaled area: 3 square inches
scale: 1 inch to 3 feet
scaled area: 3 square inches
scale: 1 inch to 2 feet
scaled area: 4 square inches
scale: 1 inch to 3 feet
scaled area: 4 square inches

Pairs
Actual Area
actual area:
36 square feet

actual area:
27 square feet

actual area:
12 square feet

actual area:
16 square feet

Answers

Answer:

Step-by-step explanation:

scale: 1 inch to 2 feet

scaled area: 3 square inches

+

actual area:

27 square feet

scale: 1 inch to 3 feet

scaled area: 4 square inches

+

actual area:

36 square feet

scale: 1 inch to 3 feet

scaled area: 3 square inches

+

actual area:

12 square feet

scale: 1 inch to 2 feet

scaled area: 4 square inches

+

actual area:

16 square feet

This is the backside from the other photo I need extra help with this

Answers

Answer:

No LED lights pls, it makes it harder to view and consequently harder to answer.

can you turn off the leds it makes harder to read

Please help take your time. Sorry about bad pic i give bonus point.

Answers

Answer:

B C and D

Step-by-step explanation:

that your unit rate is gonna be 3 dollars for a pound because at one pound it is at 3 dollars.

when it hits 24 it is above the 8 in pounds so it will be 24 dollars for 8 ponds

it is non proportional relationship because the line does not cross back and touch the origin

please help me with this math :)

Answers

Answer:

The X is equal to 1.75

Step-by-step explanation:

3.5X2.25=7.875

14/7.875=1.75

Answer: x=1.75

Step-by-step explanation:

rearrange the term: 3.5 (2.25 + x) = 14

the new term: 3.5 (x + 2.25) = 14

Combine multiplied terms into a single fraction, then distribute.  

x = 1.75

Help me please please please PLEASE! NO LINKS

Answers

Answer:

for the first one its    right one down 4

for the second one its    right 4 down 1

for the last one its       left 1 up 4

im pretty sure i helped u with your other one too

hope this helps

they got it right above ^

The cost of having photos taken includes a sitting fee and $12 for each portrait. The cost of 3, 6, and 9 photos respectively is $51, $87, and $123. What is the sitting fee? Use units in your answer and round answer to the hundredths place, for example $2.35
plz help

Answers

Answer:

The sitting fee is 15 dollars

Step-by-step explanation:

1 - 12 x 3 = 36

2 - 51 - 36 = 15

3 - 12 x 6 = 72

4 - 87 - 72 = 15

Answer:

$15.00

Step-by-step explanation:

cost of photos = sitting fee + $12 per photo

Let the number of photos = x

Let the sitting fee = s

cost of photos = s + 12x

cost of 3 photos = $51

s + 12(3) = 51

s + 36 = 51

s = 15

Answer: The sitting fee is $15.00

Can someone pls help with this and please explain how u got the answer or you wont receive credit. And this id due in 8 minutes pls help!! I will give brainliest to the person who explains it correctly with more detail.

Answers

Answer:

Answer to A: Each pound of coffee costs $6.32 dollars. Answer to B: He could buy 0.16 pounds of coffee for $1 dollar.

Step-by-step explanation:

For A, we use division. He payed $18.96 dollars for 3 pounds for coffee.

18.96 / 3 = 6.32.

Each pound of coffee costs $6.32 dollars.

For B, we use division Again.

The amount of pounds he could buy for $1 dollar is 0.16 pounds of coffee.

Hope this helps!

If you like it, please mark me as brainiest!

Answer:
Answer to A: Each pound of coffee costs
$6.32 dollars. Answer to B: He could buy
0.16 pounds of coffee for $1 dollar.
Step-by-step explanation:
For A, we use division. He payed $18.96
dollars for 3 pounds for coffee.
18.96 / 3 = 6.32.
Each pound of coffee costs $6.32 dollars.
For B, we use division Again.
The amount of pounds he could buy for $1
dollar is 0.16 pounds of coffee.
Hope this helps!
If you like it, please mark me as brainiest!

4 ice cream cones cost $5. At this rate, how much do 3 ice cream cones cost?

Answers

Answer:

$3.75

Step-by-step explanation:

Answer: $3.75
Explication:
5/4 = 1.25
1.25•3=3.75

4 pounds of grapes cost $5. 7 pounds of grapes cost $8.75. What is the cost per pound?

Answers

Answer:

$1.25 per pound

Step-by-step explanation:

$5 ÷  4 = $1.25

$8.75 ÷ 7 = $1.25

(w^2/x−3)÷10⋅z when w=−9, x = 2.7, and z=−2/5

Answers

Answer:

-40/3

Step-by-step explanation:

rewrite the equation as -

(-9)/2.7) 10x2/5 > -9/27x2x2

-9/27/10x2x2

-10/3x2x2

= -40/3

Ok,so I need help on exactly how to do this questions on my homework…I don’t get it.

Answers

Answer:

11. 15  12. 8

Step-by-step explanation:

ok so

the big ones equal = 3

and small one equal =1

also red means negative and orange postive

so 9+ 6 equals postive 15

and 12- 4 = 8

Answer:

9 x 6 = 54

24 x -4 = -96

Step-by-step explanation:

If what you are saying is correct:

The first one is 9 x 6 = 54

The second one is 24 x -4 = -96

-Chetan K

Simplify the expression. Write your answer as a power. (−4)^5⋅(−4)^7

Answers

The Answer is 4^12 or -4^12 I’m not sure

Write an equation of a line that passes through the point (2,0) and is perpendicular to the line y = − 1/2 x + 3.

Answers

Answer:

Step-by-step explanation:

The answer to your problem is y = 2x - 4

giving brainiest
Graph the line using Point-Slope Form.

Answers

Answer:

Step-by-step explanation:

y=m+b

I think it is Y = m + b ……….

Find 3y+x if 2x-3y=12 and 8x+3y=14

Answers

Answer:

check the photos.

but if you substitute your x and y into the equation, your answer will be = -6/7

2x-3y=12 8x-12y=48
8x+3y=14 8x+3y=14

-15y=34

25 points for this please help with step by step

Answers

a) 20.9

    The mean is calculated by adding up the scores and dividing the total by the number of scores, it is also called the average.

    First, we can count and see there are 11 players (makes sense for a football team). Adding up the ages gives us 19 + 19 + 20 + 20 + 20 + 21 + 22 + 22 + 22 + 22 + 23 = 230. Divide by 11 and we get a mean of of about 20.9!

b) 30

To figure this out, we will set up an equation that looks like this:

[tex]\frac{19 + 19 + 20 + 20 + 20 + 21 + 22 + 22 + 22 + 22 + 23+x}{12} =22[/tex]

And now we will solve:

[multiply both sides by 12] 230 + x = 264

[subtract 130 from both sides] x = 30

So the age of the new player should be 30!

Have a nice day!

    I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:

For A its 21

Step-by-step explanation:

add all the numbers which is 105, then divide it by 5 because thats how many numbers we have. the answer is 21

If Dorie devotes the same number of hours to studying for these three classes each week, what is the total number of hours Kathleen will study over a three week period?

Answers

Answer:

The answer is 17.2 hours

Step-by-step explanation: Because first you add all hours together (which is 86/15) then multiple it by 3 (week) which is 86/5 = 17.2 hours

Dave builds sheds. The widths of the doorways for the sheds vary with the area of the shed. One of Dave's sheds has an area of 24 square feet and a doorway that is 2 feet wide. Another one of Dave's sheds has an area of 48 square feet and a doorway that is 4 feet wide. What is the pattern rule that Dave uses for the widths of the shed doorways?

Answers

Answer:12 ft long

Step-by-step explanation:

First, divide 24 by 2 and get 12

Second, divide 48 by 4 and also get 12

Last, the answer is 12 ft long

Yulee primary school maintains a library with 81 English books to every 90 Math books. Find the ratio of English books to the Math books.

Answers

1:0.9 you just need to divide 81/90=0.9 therefore meaning the there 1 English book for every 0 math books

Answer:

81 to 90 or 81:90 or 81/90

Ill give brainless if you get right

Answers

2.4x+9.6x=180
12x=180
x=15
9x=135°
0.1x= 1.5°
0.6x= 9°
9x+0.6x=9.6x
135°+9°=144°

What is the slope of the line, y=5−4x?

Answers

Answer:

(m) =  

ΔY

ΔX

= 0

Step-by-step explanation:

Answer:

the slope is -4

Step-by-step explanation:

You are given the equation y=5-4x. You can put that into slope intercept form.  Slope intercept form is y=mx+b where b is the y intercept and m is the slope. In this equation the slope is -4 and the y intercept is 5. You can  rearrange this equation into slope intercept form. If you do this you will get y=-4x+5.

Hope this helps :)

Please give brainiest

I will giver brainliest to the person with the most detailed answer. That means tell me how you got ur answer. And the person who answers with the most clear explanation as well. Good luck!! This is due in 8 minutes as well. And pls number ur answers in order so it is clear!!

Answers

Answer:

(12,13)

Step-by-step explanation:i just guessed

11: the y axis is the vertical line. the red line crosses the y axis at -3 which means that you’ve found your y-intercept for the red line. the blue line crosses the y axis at 1 and for the slope it’s rise/run so if it’s going down it’s a negative

will giver brainliest to the person with the most detailed answer. That means tell me how you got ur answer. And the person who answers with the most clear explanation as well. Good luck!! This is due in 8 minutes as well. And pls number ur answers in order so it is clear!!

Answers

Answer:

She waited five minutes.

Step-by-step explanation:

You can tell that she waited five mins because between points D and E there is a straight line meaning that she was not moving. So you know that she was standing still waiting.

I hope this helps!!!

Answer:

i think it's 5 min

Step-by-step explanation:

solve using elimination:

5x-7y=-16

4x-2y=-20

Answers

X=- 4
Y= 0
Hope this helps
X=-4
Y=0
Hope this helps you

PLEASE HELP ILL GIVE BRAINLY (THIS IS TIMED!)

Answers

Answer: 16

Step-by-step explanation:

(50 - (2x9)) / 2  = 16

Answer:

5.5 in ?

Step-by-step explanation:

PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELP AND NI FILES

Answers

I hate files that give you viruses, anyways I'm going to do this question.

Though, can you give me more information please?

Answer:

Melinda saves 2 less dollars than Marcus each week.

Step-by-step explanation:

Y = 12x + 75 is Melinda's equation. Y = 14x + 25 is Marcus's equation. First we'll disregard how much money they have saved already to see how much they save weekly. So Melinda's new equation is Y = 12x, and Marcus's new equation is Y = 14x. Now we'll do Marcus's equation (14x) - Melinda's equation (12x) to see how much more money Marcus saves each week, which will in turn will tell us how much less money Melinda saves each week.

14 x - 12x = 2. (x-x=0) This tells us Marcus saves 2 more dollars than Melinda each week.

Which gives us our answer, Melinda saves 2 less dollars than Marcus each week.

1
What is the solution to the system of equations? Use any method you prefer to solve.

y=5/4x-2

y= -1/4x+16

a. (12, 13)

b. (-2, 16)

c. (4, 4)

d. (5, -1)

NO LINKS
​

Answers

5/4x-2=-1/4x+16 5/4x+1/4x=18 6/4x=18 x=12 y=13 choose a. (12,13)
B is the answer to this

So i dont know what to do but it's systems of linear equations.

Answers

Answer:

the wind is 23 km/h

the speed of the plane without the wind is 135 km/h

Step-by-step explanation:

158-112=46

46/2= 23

112+23= 135

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