erona08 erona08

15-10-2020
Mathematics

contestada

At a used book sale,5 books cost $15. How many books can u buy for $21

Respuesta :

HatfieN4995 HatfieN4995

15-10-2020

Answer:

7 books

Step-by-step explanation:

Since you know that 5 books cost $15, you can assume that each book costs $3. Since this is your assumption (which we know is true) you can divide 21 by 3, which gives you 7.

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