document.write( "Question 158236This question is from textbook Intermediate Algebra for College Students
\n" );
document.write( ": (Book asks first to setup an inequality that can be used to solve the problem, then solve it to find the desired value)\r
\n" );
document.write( "\n" );
document.write( "Long Distance: The telephone long-distance carrier Telecom-USA, which markets itself as 10-10-220, charges customers $0.99 for the first 20 minutes and then $0.07 for each minute (or any part thereof) beyond 20 minutes. If Patricia Lanz uses this carrier, how long can she talk for $5.00? \n" );
document.write( "
Algebra.Com's Answer #116600 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! .99+X*.07=5 \n" ); document.write( ".99+.07X=5 \n" ); document.write( ".07X=5-.99 \n" ); document.write( ".07X=4.01 \n" ); document.write( "X=4.01/.07 \n" ); document.write( "X=57.3 \n" ); document.write( "57+20= 77 MINUTES IS THE MAXIMUM MINUTES SHE CAN USE FOR $5.00. \n" ); document.write( "PROOF \n" ); document.write( ".99+.07*57<5 \n" ); document.write( ".99+3.99<5 \n" ); document.write( "4.98<5 \n" ); document.write( " |