document.write( "Question 508036: One morning Madeline drove 5 hours before stopping to eat. After lunch, she increased her speed by 10mph in order to complete a 430-mile trip in 8 hours of driving time. How fast did Madeline drive in the morning? \n" ); document.write( "
Algebra.Com's Answer #340844 by stanbon(75887)\"\" \"About 
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One morning Madeline drove 5 hours before stopping to eat. After lunch, she increased her speed by 10mph in order to complete a 430-mile trip in 8 hours of driving time. How fast did Madeline drive in the morning?
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\n" ); document.write( "Morning DATA:
\n" ); document.write( "time = 5 hrs ; rate = r mph ; distance = 5r miles
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\n" ); document.write( "Afternoon DATA:
\n" ); document.write( "rate = r+10 mph ; time = 8-5 = 3 hrs ; distance = 3(r+19) miles
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\n" ); document.write( "Equation:
\n" ); document.write( "distance + distance = 430 miles
\n" ); document.write( "5r + 3r+ 57 = 430
\n" ); document.write( "8r = 373
\n" ); document.write( "r = 46.63 mph (morning rate)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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