Question

Janelle expanded the expression as shown below. -4(-3x + 2/7) = -12x - 3 5/7 What errors did she make? Check all that apply.

A)The first term should be positive.

B)The second term should be positive.

C) She did not distribute the -4 properly.

D) She added 2/7 to -4 instead of multiplying 2/7 by -4

E) She did not simplify the expression completely.

Answer 1

A and D are true

Explanation:

Julia had to expand the following expression:

`-4(-3x+(2)/(7)) = 12x-(8)/(7) = 12x - 1(1)/(7)`

Observing the correct method,

A)The first term should be positive.

As both -4 and -3x are negative, the first term should be positive.

B)The second term should be positive.

False.

C) She did not distribute the -4 properly.

False

D) She added 2/7 to -4 instead of multiplying 2/7 by -4

Yes because the multiplication gives 8/7

E) She did not simplify the expression completely.

False ..