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frez [133]
3 years ago
5

The phone company charges 10 cents to connect a call for one minute and 8 cents per minute after that. How long could you talk o

n the phone for 1 dollar?
Mathematics
1 answer:
Lunna [17]3 years ago
6 0
<span>The phone company charges 10 cents to connect a call for one minute and 8 cents per minute after that. 
We call x minute to talk after the first minute.
We have 10+8x</span>≤100 (cents)
and 8x≤100-10
or 8x≤90 and x≤90:8
and x≤11.25
So: <span>How long could you talk on the phone for 1 dollar: it is 11 minute and 15 seconds</span>
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