This is the call plan for Robert's cell phone:

Mathematics

2 answers:

Oduvanchick [21]3 years ago

5 0

$0.20 times 30 minutes = $6.00
So $6.00 plus the $15 charge each month = $21.00

butalik [34]3 years ago

4 0

To answer this, first make an equation representing the data:

15+ 0.20X= Bill

now plug in data you know:

15 + 0.20(30)= bill

and finally solve it:
Bill= $21.00

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