Posted by vinci on Tuesday, July 16, 2013 at 12:57am.
Find the cost C for a 10minute phone call if the cost x for the first 3 minutes is $1.80 and the cost y for each additional minute is $0.35. Use C = x + 7y.

math  Sumare, Tuesday, July 16, 2013 at 1:03am
The Answer I got is $5.49.
3+7×0.35
x+7y

math  vinci, Tuesday, July 16, 2013 at 1:23am
C = $1.80 + ( 7 x $0.35 )
= $4.25

Go with vinci's answer math  Reiny, Tuesday, July 16, 2013 at 8:13am
Sumare's answer is not correct

math  Writeacher, Tuesday, July 16, 2013 at 9:03am
Several of Sumare's answers were incorrect last night/early this morning.
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