MATHEMATICS MIDDLE SCHOOL

The side of a square is 3n-2r. What is the perimeter? What is the area?

Answers

Answer 1
Answer:

I hope this helps you

squares all sides are same

Perimeter of the square is

4.(3n-2r)=12n-8r

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Find the surface area of the composite solid.

Answers

I think the correct answer is 612

Shelly sells ice cream bars at the beach. In addition to a fixed salary, she earns a commission for each ice cream bar she sells. The table shows Shelly's total earnings, y, from selling x bars of ice cream:Which equation best shows the relationship between x and y?



Ice Cream Sales and Earnings
Number of Bars Sold(x) Total Earnings(dollars) (y)




0 60


1 65

2 70

3 75



y=x+70
y=5x+60
y+5x+70
y+x+60

Answers

Simply, the question wants you to write an equation for the points they gave you.

The points are:
(0,60)
(1,65)
(2,70)
(3,75)

The first thing we need to do is to find the slope.

\sf{Slope =(y_2-y_1)/(x_2-x_1) =(65-60)/(1-0) =(5)/(1) =\boxed{\bf{5}}

The slope is 5.

If we write an equation in the form of y = mx + b, where m is the slope, and b is the y-intercept, we would have so far:

y = 5x + b

Now, we need to find the y-intercept.
We are given the point (0,60)
That point lies on the y-axis, and therefore, 60 is the y-intercept.

Our final equation is y = 5x + 60.

how could you check the answer to 27-15=12 using addiction a. 27+12=15 b.. 15-12=27. c.12+15=27 d.27+15=12

Answers

You would do 27+12 because your doing inverse operations.

I need the answers for these please

Answers

11.p=-8, 17-8=9
12.y=11, 3*11=33+16=46
13.t=4, 4*4=16-14=2
14.x=9, -9x 9*8=82-9=72-9=62
15.z=4, 12*4=48-18=30
16.g=0, 4*0=0, 7+0=7
17.x=4, 9*4=36-24=-3
18.q=3, 18*3=48+2=50
19.c=2, 3*2=6-4.5=4.1
20.y=4, 9+4=13+4.8=17.4

Which polynomial is a perfect square trinomial A. 25x^2-20x-16
B. 9a^2-30a-25
C. 25b^2-15b +9
D. 16x^2-24x+9

Answers

Answer:

D

Step-by-step explanation:

16x^2 - 24x + 9

(4x - 3)^2

(4x - 3) (4x - 3)

16x^2 - 12x - 12x + 9

16x^2 - 24x + 9

Mr. Hawkins is covering a room in carpet. The room measures 14 feet by 12 feet in a rectangular shape. Each square foot of carpet costs $2.90. What is the cost of carpeting the room?

Answers

Answer:

The total cost of adding wallpaper to the room is $487.20

Step-by-step explanation:

Basically, how I got the answer is:

1. The shorter sides of the rectangle are 12 and the longer sides are 14.

2. The formula for a rectangle is A = l x w. The "l" means length and the "w" means width. 14 is the length and 12 is the width. So you should now have A = 14 x 12. If you multiply 14 by 12, you will get 168.

3. Since 1 square foot of carpet costs $2.90, then you should multiply by 168, which will give you $487.20 and that's pretty much it.

Hope this helps! :)
first lets find the area of the floor.

A=l*w     where l=length and w=width
Plug in the data
A=14*12
A=168ft²

If 1 square foot of carpet is 2.90$, then 168 square feet are...

  1 sqft         168sqft
_______ = ________
  2.90$             x$

Cross multiply
1x=487.20
divide both sides by 1
x=487.20 dollars

Answer= $487.20
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