Question

PLEASE PLEASE HELP I WILL GIVE BRAINALIST AND EXTRA POINTS

Answer 1

Explanation:

1) phone

38.95 = 0.03 * mins + 29.95

9.00 = 0.03 * mins

9.00 /0.03 = mins

300 = mins

so he used 300 minutes :)

2) books

8.70 =14 * bookPrice + 2.40

6.30 = 14 * bookPrice

6.30 / 14 = bookPrice

0.45 = bookPrice

each book cost 45 cents :)