document.write( "Question 976015: Keisha will rent a car for the weekend. She can choose one of two plans. The first plan has an initial fee of
\n" );
document.write( "$40
\n" );
document.write( " and costs an additional
\n" );
document.write( "$0.16
\n" );
document.write( " per mile driven. The second plan has an initial fee of
\n" );
document.write( "$49
\n" );
document.write( " and costs an additional
\n" );
document.write( "$0.11
\n" );
document.write( " per mile driven.
\n" );
document.write( "For what amount of driving do the two plans cost the same?\r
\n" );
document.write( "\n" );
document.write( "What is the cost when the two plans cost the same? \n" );
document.write( "
Algebra.Com's Answer #598955 by Cromlix(4381)![]() ![]() You can put this solution on YOUR website! Hi there, \n" ); document.write( "Set up two formulae: \n" ); document.write( "For Keisha 1st Plan: \n" ); document.write( "$40 + n(0.16) [n = no. of miles driven.] \n" ); document.write( "For Keisha's 2nd Plan: \n" ); document.write( "$49 + n(0.11) \n" ); document.write( "Make them equal one another: \n" ); document.write( "$40 + n(0.16) = 49 + n(0.11) \n" ); document.write( "Collect like terms: \n" ); document.write( "n(0.16) - n(0.11) = 49 - 40 \n" ); document.write( "n(0.05) = 9 \n" ); document.write( "n = 9/0.05 \n" ); document.write( "n = 180 \n" ); document.write( "Therefore 180 has to be driven \n" ); document.write( "before the plans cost the same. \n" ); document.write( "The cost is $68.80 \n" ); document.write( "Hope this helps:-) \n" ); document.write( " |