Adding and Subtracting Expressions

Question 1

Carmen simplifies the expression . The coefficient of the variable y in her simplified answer is

Revolt · Accepted Answer

10.

Question 2

Which expression is equivalent to (–3y – x) – (5y – 8x)?

Revolt · Accepted Answer

–8y + 7x

Question 3

What is the difference of ?

Revolt · Accepted Answer

Negative 6.3 x + 1.7

Question 4

Katrina is asked to simplify the expression . She writes: Which property allows her to do this?

Revolt · Accepted Answer

the distributive property

Question 5

Which expression is equivalent to ?

Revolt · Accepted Answer

Negative 7 y + 8 x

Question 6

What is the sum of (–2.1x + 3.7) and (5 + 4.9x)?

Revolt · Accepted Answer

2.8 x + 8.7

Question 7

What is the simplest form of the expression (14.2a + 9.8b) – (13.1b – 0.2a) – (3.7a + 4.8b)?

Revolt · Accepted Answer

10.7a – 8.1b

Question 8

Which facts could be applied to simplify this expression? Check all that apply.

Revolt · Accepted Answer

To add like terms, add the coefficients, not the variables.; The simplified expression is .; Only combine terms which contain the same variable.

Question 9

Ella simplifies and says the result is b 5r. What error did Ella make?

Revolt · Accepted Answer

Ella incorrectly combined the r coefficients. The correctly simplified expression is b 3r.

Question 10

Clara simplifies and says the result is . What error did Clara make?

Revolt · Accepted Answer

Clara incorrectly combined the r coefficients. The correctly simplified expression is .

Adding and Subtracting Expressions Answers