Question

Maggie used the commutative property to write StartFraction 4 Over 5 EndFraction + 6.9 y minus 8 as the equivalent expression 6.9 y + 8 minus StartFraction 4 Over 5 EndFraction. Did Maggie apply the commutative property correctly? Why or why not?

a. Yes, the terms with variables should be written first.
b. Yes, there is the same number of terms.
c. No, some of the terms changed signs.
d. No, there should be two terms in parentheses.

Answer 1

c

Explanation:

Answer 2

The correct answer is C. No, some of the terms changed signs.

Explanation:

Maggie wrote:

4/5 + 6.9y - 8 as the equivalent expression of:

6.9y + 8 - 4/5

She did not apply the commutative property correctly because she changed the signs of 4/5 and 8 and in consequence, the result will not be the same.

The correct answer is C. No, some of the terms changed signs.