math
posted by vinci on .
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.

The Answer I got is $5.49.
3+7×0.35
x+7y 
C = $1.80 + ( 7 x $0.35 )
= $4.25 
Sumare's answer is not correct

Several of Sumare's answers were incorrect last night/early this morning.
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