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For her phone service, Lisa pays a monthly fee of $28 , and she pays an additional $0.05 per minute of use. The least she has been charged in a month is $98.25 .

Respuesta :

kritter1
Assuming you have to find the number of minutes she used; 

Let x be the number of minutes she used, then: 

28+0.05x=98.25 
0.05x=98.25-28
0.05x=70.25 
x=70.25/0.05
x=1405 

Therefore, Lisa used 1405 minutes. 

Hope I helped :)