Question

F(m) = 2.5 + 0.12m

If Natalie paid $6.82 for one call, how many minutes long was it?
Select one:
A. 28
B. 36
C. 42
D. 45

Answer 1

B. 36.

Explanation:

Substituting 6.82 for m:

6.82 = 2.5 + 0.12m

0.12 m = 6.82 - 2.5

0.12m = 4.32

m = 4.32 / 0.12

m = 36 minutes.

Answer 2

36 minutes long

Explanation:

6.82 = 2.5 + 0.12m

4.32 = 0.12m

36 = m; 36 minutes long.