document.write( "Question 174429: Susie,Joey and Linda went to the carnival. Susie brought 2 funnel cakes and a cotton candy for $13. Joey brought a funnel cake, a cotton candy, and a large soda for $12. Linda brought 2 bags of cotton candy and a large soda for $10. How much did each item cost? \n" ); document.write( "
Algebra.Com's Answer #129425 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Susie,Joey and Linda went to the carnival. Susie brought 2 funnel cakes and a cotton candy for $13. Joey brought a funnel cake, a cotton candy, and a large soda for $12. Linda brought 2 bags of cotton candy and a large soda for $10. How much did each item cost \n" ); document.write( ": \n" ); document.write( "Let f = cost of a funnel cake \n" ); document.write( "Let c = cost of cotton candy \n" ); document.write( "Let s = cost of a soda \n" ); document.write( ": \n" ); document.write( "Write an equation for each statement: \n" ); document.write( ": \n" ); document.write( "\"Susie brought 2 funnel cakes and a cotton candy for $13.\" \n" ); document.write( "2f + c = 13 \n" ); document.write( ": \n" ); document.write( "\" Joey brought a funnel cake, a cotton candy, and a large soda for $12.\" \n" ); document.write( "f + c + s = 12 \n" ); document.write( ": \n" ); document.write( "\"Linda brought 2 bags of cotton candy and a large soda for $10.\" \n" ); document.write( "2c + s = 10 \n" ); document.write( ": \n" ); document.write( " How much did each item cost \n" ); document.write( ": \n" ); document.write( "Arrange the equations like this: \n" ); document.write( "2f + c + 0s = 13 \n" ); document.write( " f + c + s = 12 \n" ); document.write( "0f +2c + s = 10 \n" ); document.write( ": \n" ); document.write( "Multiply the last equation by -1 and add the three equation: \n" ); document.write( "2f + c + 0s = 13 \n" ); document.write( " f + c + s = 12 \n" ); document.write( "0f -2c - s = -10 \n" ); document.write( "------------------ addition eliminates c and s, find f \n" ); document.write( "3f = 15 \n" ); document.write( "f = $5 for a funnel cake \n" ); document.write( ": \n" ); document.write( "Using the 1st equation \n" ); document.write( "2(5) + c = 13 \n" ); document.write( "c = 13 - 10 \n" ); document.write( "c = $3 for cotton candy \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "I'll let you find the cost of a soda: \n" ); document.write( ": \n" ); document.write( "Check the solutions in the original equations \n" ); document.write( " \n" ); document.write( " |