document.write( "Question 700506: Mark is selling buttons for $1.50 at a craft fair. He paid $25 for the booth space and $50 for supplies.\r
\n" ); document.write( "\n" ); document.write( "a.How many buttons will he need to sell to break-even (zero profit)?\r
\n" ); document.write( "\n" ); document.write( "b.If he sells 135 buttons, what will his profit be?\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "For a. I got f(x)= 1.50x+75
\n" ); document.write( "and b. 40=x \n" ); document.write( "

Algebra.Com's Answer #431856 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Profit is ( income ) - ( costs )
\n" ); document.write( " $\"++P+=+I+-+C+\"$
\n" ); document.write( "Let $\"+x+\"$ = number of buttons sold
\n" ); document.write( " $\"+I+=+1.5x+\"$
\n" ); document.write( " $\"+C+=+25+%2B+50+\"$
\n" ); document.write( " $\"+C+=+75+\"$
\n" ); document.write( " $\"+P+=+1.5x+-+75+\"$
\n" ); document.write( "(a)
\n" ); document.write( "When profit = 0
\n" ); document.write( " $\"+0+=+1.5x+-+75+\"$
\n" ); document.write( " $\"+1.5x+=+75+\"$
\n" ); document.write( " $\"+x+=+50+\"$
\n" ); document.write( "If he sells 50 buttons, he breaks even
\n" ); document.write( "(b)
\n" ); document.write( " $\"+P+=+1.5x+-+75+\"$
\n" ); document.write( " $\"+P+=+1.5%2A135+-+75+\"$
\n" ); document.write( " $\"+P+=+202.5+-+75+\"$
\n" ); document.write( " $\"+P+=+127.5+\"$
\n" ); document.write( "His profit is $127.50
\n" ); document.write( " \n" ); document.write( "

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