The telephone connection for a home computer costs \(\$1.25\) for every 3 minutes it is in use. How much does it cost for 21 minutes?

Explanation

Set up a proportion and solve for the missing term.

\(\frac {\text { minutes }}{\text { cost }}=\frac{3}{1.25}=\frac{21}{ x}\)

\(3 x=1.25 \times 21\)

3*x* = 26.25

*x* = 8.75

So, 21 minutes will cost \(\$8.75\).

Visit our website for other GED topics now!

Related questions