You estimate 547= 540 and 92= 90.So now divide 540/90 and there you got your answer.
60 is your answer
A telephone long-distance carrier charges customers $0.99 for the first 20 minutes and then $0.06 for each minute(or any part thereof) beyond 20 minutes. If Mary uses this carrier,how long can she talk for $4.00?
I started off with 0.99x+20+0.06x=4.00. PLEASE help, I don't think I set it up correctly.
3 answers
where do you get 547 and 92 from?
first 20min
.99x
.99*20=19.8
after 20min
0.06x+19.8
$4 is less than 19.8
so the answer would be .99x=4
x=4/.99
x=4.04
.99x
.99*20=19.8
after 20min
0.06x+19.8
$4 is less than 19.8
so the answer would be .99x=4
x=4/.99
x=4.04
3 answers