Question

A cell phone company charges $55 a month for unlimited text and $0.50 per minute for phone calls. The bill last month was $66. Write an equation to find out how many minutes for phone calls were charged on the bill. (use notes in the Schoology "Notes" folder)

Answer 1

we can write an equation

$T=55+0.50m$

where T is the total price, 55 the fixed charge, 0.5 the cost per minute and m the minutes used

if the total is 66 we must to replace T=66 and solve m

so

$\begin{gathered} 66=55+0.50m \\ 0.50m=66-55 \\ m=\frac{11}{0.50} \\ \\ m=22 \end{gathered}$

were charged 22 minutes on the bill