Problem : What is r + 5 if r = 7? If r = - 11?

12, - 6

Problem : What is 2k if k = 15? If k = 100?

30, 200

Problem : What is r2 if r = 15? If r = 2/3?

225, 4/9

Problem : What is 15f - 12 if f = 1? If f = 3?

3, 33

Problem : What is 4×(m - 6) + 34 if m = 12? If m = 0?

58, 10