A long-distance telephone company charges a monthly fee of $2.95 and a per minute charge of $0.04.The monthly cost for long distance is given by C=2´95+0'04x where x is the number of minutes used.
(a) Solve the equation for x.
(b) How many full minutes can Debbie use in one month on this plan if she does not want to spend more than $20 in long distance in one month?
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