Answer:
x=3.99 it represents the amount per book
Step-by-step explanation:
3x + 1.50 = 13.47
- 1.50 on both sides
3x= 11.97
Divide 3 on both sides.
x= 3.99
8
39/56
9
9v = 9(2i + 9j) = 18i + 81j
|9v | = = = 9
