Question

You bought 11 books for $42.35 how much would 15 books cost​

Answer 1

57.75

Explanation:

First I found the unit rate by dividing 42.35 by 11, which is 3.85.

second i multiplied the unit rate by 15 and got 57.75

Answer 2

$57.75

Explanation:

If 11 books cost $42.35,

11b=42.35

b=42.35/11

b=3.85

15 books will cost 15b.

15b

= 15*3.85

= 57.75.

15 Books will cost $57.75.