Question

1.Phone company A charges $20 a month and $0.10 per minute of phone calls. Phone Company B charges

Answer 1

I might be wrong but I think it's 50 minutes.

$0.10 x 50min = $5

$20 + $5 = $25

$0.20 x 50min = $10

$15 + $10 = $25

So, it's 50 minutes.