Question

1. rick’s cell phone bill is $38 plus $2.50 per gb of data. if the bill was $70.50, how many gb did he use?

Explanation:

Step1: Subtract the base - cost

First, subtract the base cost of the bill from the total bill to find out how much was spent on data only. Let the number of GB be $x$. The base cost is $38$ and the total bill is $70.50$. So the amount spent on data is $70.50 - 38$.
$70.50−38 = 32.50$

Step2: Calculate the number of GB

Since each GB costs $2.50$, to find the number of GB, divide the amount spent on data by the cost per GB.
$x=\frac{32.50}{2.50}=13$

Answer:

13