MATHEMATICS MIDDLE SCHOOL

I have a few problems on combining like terms please help:1)   12r-8-12
2)      n-10+9n-3      
3)    -4x-10x
4) -r-10r

Answers

Answer 1
Answer: Combing like terms is actually pretty simple. As long as you can do basic addition, multiplication, division, and subtraction, you should be fine. Like terms are two or more terms that have the same variable(s) -- sometimes like terms can be two or more regular numbers without variables as well. When combing like terms without a variable, just perform the operation as normal (i.e. 2 + 5 = 7). When combing like terms with a variable, perform the operation on the coefficients (i.e. 10x + 5x = (10+5)x = 15x). 

1) 12r - 8 - 12
Here the like terms are -8 and 12.
-8 - 12 = -20
12r - 20

2) n - 10 + 9n - 3
Here the like terms are n and 9n and -10 and -3.
To make it easier you can reorder the expression to be n + 9n - 10 - 3.
n + 9n = (1 + 9)n = 10n
-10 - 3 = -13
10n - 13

3) -4x - 10x
Here the like terms are the only two terms in the expression, -4x and -10x.
(-4 - 10)x = -14x
-14x

4) -r - 10r
Here the like terms are the only two terms in the expression, -r and -10r.
(-1 - 10)r = -11
-11r
Answer 2
Answer: 12r-20\n 10n-13\n -14x\n -11r

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In Smallville 2400 out of 20,000 workers are unemployed in big town 6750 out of 75,000 workers are unemployed which town has a larger unemployment problem why

Answers

20000=100%
2400=x%
- 20000x=240000
- x=240000/20000
- x=12%

75000=100%
6750=x%
- 75000x=675000
- x=675000/75000
- x= 9%

>Therefore, Smallvile has a larger unemployment problem since it's unmployment percentage is bigger than Big town's percentage.

The price of a table at Best Buy is $220. If the sales tax is 6%, what is the final price of the table including tax?

Answers

Answer:

$233.2

Step-by-step explanation:

0.06x220=13.2

220+13.2=233.2

Answer:

$233.20

Hope I could help you out!

Find the square root of 529

Answers

23 is the square root of 529

Is 1.5 greater than or less than 1

Answers


1.5 is greater than 1 since the decimal 1.5 = 1 +0.5 and 1= 1

compared: 1+0.5, 1
1.5 is greater than 1.
Cause 1.5= 1 + 0.5 . which is greater than 1.

How to find the answer of -√(652)

Answers

-25.5????????????

This could be wrong but I tried..

Sorry : /

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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