Question

Donna recieved a 90$ gift card for a coffee store. she used it in buying some coffee that cost 8.52$ per pound. after buying the coffee she had 38.88$ left on her card. how many pounds of coffe did she buy?

Answer 1

Given data:

The total amount Donna received is A=$90.

The cost of coffee per pound is c=$8.52.

The amount left with Donna is l=$38.88.

The expression for the total amount is,

`\begin{gathered} A=c+l \\ 90=8.52x+38.88 \\ 51.12=8.52x \\ x=6 \end{gathered}`

Thus, Donna bought 6 pound coffee.