document.write( "Question 828830: A group of students held a car wash to raise money. They charged $9 for each car and $12 for each van or SUV. Two teams worked continuously, one washing cars and the other washing vans and SUVs. The team washing cars required 25% less time per vehicle than the other team. Each team washed vehicles for 4 hours. The two teams together raised a total of $720. How long, on average, did each team take to wash a vehicle? \n" ); document.write( "
Algebra.Com's Answer #499543 by richwmiller(17219)\"\" \"About 
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9c+12v=720,
\n" ); document.write( "a=.75b,
\n" ); document.write( "ac=4,
\n" ); document.write( "bv=4\r
\n" ); document.write( "\n" ); document.write( "a=0.1 (6 minutes), b=0.133333 (8 minutes), c=40., v=30.
\n" ); document.write( ".1 (6 minutes) hour to wash a car and .1333 hours ( 8 minutes) to wash a van
\n" ); document.write( "30 cars and 40 vans
\n" ); document.write( "40*6=240 minutes
\n" ); document.write( "30*8=240
\n" ); document.write( "360+360=720\r
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