Question

If A = -4m + 1, and B = 7m - 9, what is the value of A + B, in simplest form?

a.-3m + 8,
b. 3m - 8,
c. 11m - 8,
d.11m + 9

Answer 1

The ore the answer is B. Why?

Because (-4m+1) + (7m-9) = 3m - 8

You add -4m and 7m and get 3m and the only answer that has a POSITIVE 3m is B.

Anyways, you still have to check it. 1+(-9) is -8. So A+B = 3m - 8

Answer 2

b. 3m - 8

Explanation:

A = -4m + 1

B = 7m - 9 Add the terms in columns

A +B = 3m - 8