document.write( "Question 106622: We need help solving this word problem:\r
\n" ); document.write( "\n" ); document.write( "You rent a mountain bike & helmet for $10/hr; if you have your own helmet, $7/hr; or you can buy a helmet for $28. How many hours do you need to use the trail to justify buying the helmet?\r
\n" ); document.write( "\n" ); document.write( "This is what we did to solve the problem:\r
\n" ); document.write( "\n" ); document.write( "10 - 7 * X = 28
\n" ); document.write( "3x = 28
\n" ); document.write( "we divided each side by 3 and ended up with with a decimal \n" ); document.write( "
Algebra.Com's Answer #77598 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
You rent a mountain bike & helmet for $10/hr; if you have your own helmet, $7/hr; or you can buy a helmet for $28. How many hours do you need to use the trail to justify buying the helmet?
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\n" ); document.write( "Let \"x\" be the number of hours on the trail.
\n" ); document.write( "1st: If you buy your own helmet Total Cost = (28 + 7x) dollars
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\n" ); document.write( "2nd: If you rent helmet and trail time: Total Cost = 10x
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\n" ); document.write( "INEQUALITy:
\n" ); document.write( "Buy helmet cost < Rent helmet
\n" ); document.write( "28+7x < 10x
\n" ); document.write( "3x >28
\n" ); document.write( "x > 9 1/3 hours.
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\n" ); document.write( "You have it right.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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