document.write( "Question 1156456: A car rental company offers two plans for renting a car.
\n" ); document.write( "Plan A: 30 dollars per day and 20 cents per mile
\n" ); document.write( "Plan B: 50 dollars per day with free unlimited mileage
\n" ); document.write( "For what range of miles will plan B save you money?\r
\n" ); document.write( "\n" ); document.write( "Your answer is that the mileage must be greater than? \n" ); document.write( "

Algebra.Com's Answer #779155 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+C+\"$ = the cost of B minus the cost of A
\n" ); document.write( "For any given number of days, B will cost $20
\n" ); document.write( "more than A.
\n" ); document.write( "Let $\"+n+\"$ = number of miles driven
\n" ); document.write( " $\"+C+=+20+-+%28+20%2F100+%29%2An+\"$
\n" ); document.write( "I want the range of $\"+n+\"$ for which $\"+C+\"$
\n" ); document.write( "is negative
\n" ); document.write( " $\"+20+-+%28+20%2F100+%29%2An+%3C+0+\"$
\n" ); document.write( " $\"+.2n+%3E+20+\"$
\n" ); document.write( " $\"+n+%3E+100+\"$
\n" ); document.write( "You save money for any miles greater than 100 miles
\n" ); document.write( "--------------------------
\n" ); document.write( "Check:
\n" ); document.write( "I'll choose $\"+n+=+101+\"$ mi
\n" ); document.write( "Plan A:
\n" ); document.write( " $\"+C+=+30+%2B+.2%2A101+\"$
\n" ); document.write( " $\"+C+=+30+%2B+20.2+\"$
\n" ); document.write( " $\"+C+=+50.2+\"$
\n" ); document.write( "Plan B:
\n" ); document.write( " $\"+C+=+50++\"$
\n" ); document.write( "Plan B saves money
\n" ); document.write( "OK\r
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