Respuesta :

cdw2014
Let's find out the cost of one book. Carla bought 4 for $10, so each book costs:

[tex] \frac{10}{4} [/tex]=$2.50

Amy bought 9 books, so to find out how much she spent, multiply 9 by the price of $2.50.

9×2.50 = $22.50

Otras preguntas