Question 68415
x=number of minutes a person can talk without exceeding $6.00

$0.72(x-1)+$0.96 =cost for x minutes and that has to be less than or equal to $6.00.  So, our inequality is:

$0.72(x-1)+$0.96=<$6.00  clear parens

$0.72x-$0.72+$0.96=<$6.00


$0.72x+$0.24=<$6.00  subtract $0.24 from both sides

$0.72x=<$6.00-$0.24

$0.72x=<$5.76  divide both sides by $0.72

x=<8 minutes-----------------------------answer


ck

8 minutes costs $0.96 + 7($0.72)=
8 minutes cost $0.96+$5.04=$6.00




Hope this helps-----ptaylor