document.write( "Question 325166: Media Services charges $20 for a phone and $30/month for its economy plan. The equation c=30t+20 describes the total cost, c, of operating a Media Services phone for t months.\r
\n" );
document.write( "\n" );
document.write( "The total cost of services for three months is __.\r
\n" );
document.write( "\n" );
document.write( "If a customer only has $90 avaiable, how many months of service can she recieve?\r
\n" );
document.write( "\n" );
document.write( "a) 2 1/2
\n" );
document.write( "b) 2 1/3
\n" );
document.write( "c) 2
\n" );
document.write( "d) 3
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #232845 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Media Services charges $20 for a phone and $30/month for its economy plan. The equation c=30t+20 describes the total cost, c, of operating a Media Services phone for t months. \n" ); document.write( "The total cost of services for three months is \n" ); document.write( "c(3) = 30(3)+20 = 90+20 = 110. \n" ); document.write( "========================= \n" ); document.write( "If a customer only has $90 avaiable, how many months of service can she recieve? \n" ); document.write( "Solve: 90 = 30t+20 for \"t\": \n" ); document.write( "70 = 30t \n" ); document.write( "t = 7/3 = 2 1/3 months \n" ); document.write( "=============================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "=============================== \n" ); document.write( " \n" ); document.write( "a) 2 1/2 \n" ); document.write( "b) 2 1/3 \n" ); document.write( "c) 2 \n" ); document.write( "d) 3 \n" ); document.write( " \n" ); document.write( " |