document.write( "Question 402710: Nicholas wants to order a pizza. He has a total of $13.00 to pay the delivery person. The pizza costs $7.50 plus $1.25 per topping. If he plans to tip 15% of the otal cost of the pizza, how many toppings can he order? \n" ); document.write( "
Algebra.Com's Answer #285121 by rvquartz(19)![]() ![]() You can put this solution on YOUR website! total pizza cost = x \n" ); document.write( "tip = y\r \n" ); document.write( "\n" ); document.write( "since tip is 15% of total pizza cost, then \n" ); document.write( "y = 0.15x\r \n" ); document.write( "\n" ); document.write( "since total he has to give the delivery person is 13 dollars, then \n" ); document.write( "x + y = 13\r \n" ); document.write( "\n" ); document.write( "substituting for y \n" ); document.write( "x + 0.15x = 13\r \n" ); document.write( "\n" ); document.write( "this is the same as\r \n" ); document.write( "\n" ); document.write( "1.15x = 13\r \n" ); document.write( "\n" ); document.write( "x = 11.30\r \n" ); document.write( "\n" ); document.write( "so total cost of pizza cannot be more than $11.30 \r \n" ); document.write( "\n" ); document.write( "pizza base cost is $7.50 so he has left over for toppings\r \n" ); document.write( "\n" ); document.write( "$11.30 MINUS $7.50 = $3.80\r \n" ); document.write( "\n" ); document.write( "he has $3.80 to spend on toppings and each topping costs $1.25\r \n" ); document.write( "\n" ); document.write( "3.80 divided by 1.25 = 3 remainder 0.05\r \n" ); document.write( "\n" ); document.write( "he can buy up to three toppings \n" ); document.write( " |