document.write( "Question 95871: Carl and Fred started driving from the same point, Carl driving due east and Fred traveling due west. The rate at which Carl drove was twice that of Fred. After four hours, they were 600 miles apart. Find the rate of each. \n" ); document.write( "
Algebra.Com's Answer #69844 by checkley71(8403)\"\" \"About 
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(f+2f)4=600
\n" ); document.write( "3f*4=600
\n" ); document.write( "12f=600
\n" ); document.write( "f=600/12
\n" ); document.write( "f=50 mph for Fred's speed.
\n" ); document.write( "c*2*50=100 mph for Carl.
\n" ); document.write( "proof
\n" ); document.write( "(50+100)4=600
\n" ); document.write( "150*4=600
\n" ); document.write( "600=600
\n" ); document.write( "
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