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April 20, 2014

Homework Help: math

Posted by sunny on Friday, January 18, 2013 at 3:17pm.

73. Cell Phone Plan A cell phone plan costs $3.95 per
month plus $0.07 per minute. (Assume that a partial
minute is not rounded up.)
(a) During July, a person talks a total of 50 minutes.
What is the charge?
(b) Write an equation in slope–intercept form that
gives the monthly cost C of talking on this plan
for x minutes.
(c) If the charge for one month amounts to $8.64,
how much time did the person spend talking on
the phone?

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