11. According to the given data we have the following:
cable company charges $24.95 a month for basic service
$6.94 a month for each additional channel. Let the additional channel be=x
Kelly's monthly bill=$45.80.
The maximum amount of money that Kelly can afford to pay is $45.80, therefore, in order to calculate the amount of premium channels we would have to calculate the following equation:
$24.95+ $6.94x=$45.80
$6.94x=$45.80-$24.95
$6.94x=$20.85
x=$20.85/$6.94
x=3
Therefore they would be receiving 3 premium channels.