Question

Evaluate m – n when m = 3.4 and n = –8.7.

Answer 1

3.4 - (-8.7) = 12.1

I hope this helps. (:

Answer 2

m(3.4) - n(-8.7)

First, substitute in your numbers for m and n. / Your problem should look like:
Second, subtract 3.4 - -8.7. / Your problem should look like: 12.1

Answer: 12.1 (D)