Question

Pls help our teacher didn’t explain how to solve these. also show work

Answer 1

15) f = 18

3f = 54

6f = 108

16) k = 69

Explanation:

15)

3f + 6f + f = 180

10f= 180

f = 18

16)

42 + k + k = 180

42 + 2k = 180

2k = 138

k = 69