Janine spend $55 at the bookstore. She bought 2 books for a total of $10 and 4 books for a total of $25. How many additional books did she buy if her average cost was $5 per book?

a: 17

b: 2

c: 5

d: 11

$4

Step-by-step explanation:

Total expenditure is $55

Breakdown

2 books cost $10

4 books cost $25

Subtotal for 6 books is 10+25=$35

Remaining amount from total is 55-35=$20

If each book costs approximately $5 then for $20, each book is 20/5=$4

she was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75 .

correct me if i'm wrong and if it is i'm truly sorry.