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2 years ago

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For her phone service, Lisa pays a monthly fee of $27, and she pays an additional $0.05 per minute of use. The least she has bee

n has been charged in a month is $90.70. What are the possible number of minutes she has used her phone in a month? Use m for the number of minutes, and solve your inequality for m.

1 answer:

Sergio [31]2 years ago

4 0

The equation to find the amount of money spent is 27 + 0.05m. This equation, in this case, needs to be larger or equal to 90.70. So our inequality would be:

27 + 0.05m >= 90.70

Now we can solve this equation for m.

27 + 0.05m >= 90.70
0.05m >= 63.70
m >= 1274

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