document.write( "Question 133769: A high school class wants to raise money by recycling newspapers. The class decided to rent a truck at a cost of $150 for the week. The market price for recycled newspapers is $15 per ton. Write an equation representing the amount of money the class will make based on the number of tons of newspapers collected. Explain what you did to get your answer. \n" ); document.write( "

Algebra.Com's Answer #97871 by solver91311(24713) $\"\"$ $\"About$

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The amount of money the class makes is called the profit and profit is the difference between the money received, called revenue, and the cost of doing business, called cost.\r
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\n" ); document.write( "\n" ); document.write( " $\"P=R-C\"$ .\r
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\n" ); document.write( "\n" ); document.write( "In this example, there is only one cost element, the truck rental of $150. In other words, $\"C=150\"$ And there is only one revenue element, $15 for every ton of newspaper. The total revenue is the number of tons of newspaper collected times $15, and if x represents the number of tons, 15x represents the revenue from x tons, so $\"R=15x\"$ \r
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\n" ); document.write( "\n" ); document.write( "So, substituting:\r
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\n" ); document.write( "\n" ); document.write( " $\"P=15x-150\"$ \r
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