document.write( "Question 198990: You can drive 70 mph on the freeway and 35 mph in town. If an 80 mile drive took you 2 hours, how long did you drive in town? \n" ); document.write( "

Algebra.Com's Answer #149475 by RAY100(1637) $\"\"$ $\"About$

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Distance = Velocity * Time
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\n" ); document.write( "Let f = freeway time, let t = town time
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\n" ); document.write( "70 (f) + 35 (t) = 80
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\n" ); document.write( "but f + t = 2,,,,,f = 2-t
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\n" ); document.write( "70(2-t) +35 (t) = 80
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\n" ); document.write( "140 -70t +35t = 80
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\n" ); document.write( "-35 t = -60
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\n" ); document.write( "t = 1.71 hrs
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\n" ); document.write( "f = 2- 1.71 = .29 hrs
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\n" ); document.write( "70 (.29) + 35(1.71) = 80,,,,ok \n" ); document.write( "

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