Question 1200236
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A phone company offers two monthly plans. Plan A costs $23 plus an additional $0.15 
for each minute of calls. Plan B has no initial fee but costs $0.20 for each minute of calls. 
For what amount of calling do the two plans cost the same? 
What is the cost when the two plans cost the same?
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<pre>
Plan A cost is A(m) = 23 + 0.15m  dollars, where m represents minutes.

Plan B cost is B(m) =      0.20m  dollars, where m represents minutes.


The cost is the same when  A(m) = B(m),  or

    23 + 0.15m = 0.20m    dollars.


From this equation find m

    23 = 0.20m - 0.15m 

    23 =     0.05m

     m =  {{{23/0.05}}} = 460  minutes.


hus the cost of planes A and B is the same at m - 460 minutes.    <U>ANSWER</U>

This cost is  0.2*460 = 92 dollars.                               <U>ANSWER</U>
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Solved, with complete explanations.