MATHEMATICS MIDDLE SCHOOL

What is -2m^2-2mn+8-10m+10n+mn+4n^2-5n simplify to

Answers

Answer 1
Answer: find like terms and group them
3n and 5n are same and 4n^2 and 4n^2 are same
but 3mn and 5n are not and 3n and 2n^3 are not

group like terms
(-2m^2)+(-2mn+1mn)+(8)+(-10m)+(10n-5n)+(2n^2)
add like terms
(-2m^2)+(-mn)+(8)+(-10m)+(5n)+(2n^2)
-2m^2+2n^2-10m+5n-mn+8 is simplest form

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You buy the same number of brushes,rollers,and paint cans. Write an expression in simplest form that represents the total amount of money you spend for painting supplies

Answers

BrushesX+ rollersX+ paint cansX= total

What is 12.2 rounded to the nearest tenth?

Answers

12,2 to the nearest tenth is 10

Final answer:

12.2 is already rounded to the nearest tenth. This is because it has a single digit after the decimal point, indicating that it is already in the tenths place.

Explanation:

The question is asking about rounding a number to the nearest tenth. When rounding to the nearest tenth, we look at the number in the hundredth place. Since 12.2 only has digits in the tens and ones places, there are no additional digits in the hundredths place that might change the tenth place on rounding.

Therefore, 12.2 is already rounded to the nearest tenth because it has a single digit after the decimal point, which represents tenths. The number itself does not change when we're rounding to the tenth place.

Learn more about Rounding Decimals here:

brainly.com/question/13769251

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Question 3.Which association best describes the scatter plot?

A. negative linear association

B. negative nonlinear association

C. positive linear association

D. positive nonlinear association

Answers

C, positive linear association. It is positive because it moves upward on the graph (left to right) and it is linear because it is a nearly straight line.
C. positive linear association

Can someone help me? I can barely think. " write two polynomials whose difference is 6x+3".

Answers

(x^2+9x+12) - (x^2+3x+9)= x^2+9x+12-x^2-3x-9=9x-3x+12-9=6x+3

Help? :,) I know it might look easy but not for me!!

Answers

the answer is c = 11mm

In a test, the 10 students in group 1 get a mean score of 43%.The 15 students in group 2 get a mean score of 57%.

Hank says, " The mean score for all 25 students is 50%."
What mistake has Hank made?

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What is the correct mean score for all 25 students?

Answers

The mistake is that he forgot that the groups were not equal! one group was bigger than another, but he treated them as if they were equal

the real mean is calculated like this:

(43*10+15*57)/25=

(1285)/25=51.4


the real mean was 51.4
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