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18-03-2020
Mathematics

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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

Respuesta :

opudodennis opudodennis

26-03-2020

Answer:

$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

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