Adding and Subtracting Expressions

Question 1

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

Revolt · Accepted Answer

the distributive property

Question 2

Which expression is equivalent to (3b + 2r) + (4b + r)?

Revolt · Accepted Answer

7b + 3r

Question 3

Which expression is equivalent to ?

Revolt · Accepted Answer

Negative 7 y + 8 x

Question 4

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 5

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

Revolt · Accepted Answer

10.

Question 6

What is the difference of ?

Revolt · Accepted Answer

Negative 6.3 x + 1.7

Question 7

After simplifying, which expressions are equivalent? Select three options.

Revolt · Accepted Answer

(3.4a – 1.7b) + (2.5a – 3.9b); (–3.9b + a) + (–1.7b + 4.9a); 5.9a – 5.6b

Question 8

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 .

Question 9

Jakob is asked to simplify the expression –3a + 4b + 5a + (–7b). He writes: –3a + 4b + 5a + (–7b) = –3a + 5a + 4b + (–7b).Which property allows him to do this?

Revolt · Accepted Answer

the commutative property

Question 10

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

Revolt · Accepted Answer

–8y + 7x

Adding and Subtracting Expressions Answers

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