document.write( "Question 274393: Producing x units of tacos costs C(x)=5x+20; revenue is R(x)=15x, where C(x) and R(x) are in dollars.
\n" ); document.write( "a. What is the break-even quantity?
\n" ); document.write( "b. What is the profit from 100 units?
\n" ); document.write( "c. How many units will produce a profit of $500?
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Algebra.Com's Answer #724859 by meeelisa21(1)\"\" \"About 
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The correct answer to b is:
\n" ); document.write( "P(x)=R(x)-C(x)
\n" ); document.write( "P(x)=15x-(5x+20)
\n" ); document.write( "P(x)=15x-5x-20
\n" ); document.write( " =10x-20\r
\n" ); document.write( "\n" ); document.write( "Now put in 100 units
\n" ); document.write( "10(100)-20
\n" ); document.write( "1000-20 = 980 units
\n" ); document.write( "
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