For his phone service, John pays a monthly fee of $17, and he pays an additional $0.07 per minute of use. The least he has been charged in a month is $118.99.
What are the possible numbers of minutes he has used his phone in a month?
Use m for the number of minutes, and solve your inequality for m.
In this case
118.99 = ( 17 + 0.07m )
We need to solve for m
118.99 = 17 +0.07 m
Subtract 17 from both sides
118.99 -17 = 0.07 m
101.99 = 0.07 m
Divide by 0.07
m = 101.99/0.07= 1457
Number of minutes = 1457
