document.write( "Question 181931: The formula for calculating the braking distance needed when traveling at a certain speed is d=x^2/20 + x, where x is the speed of the car and d is the stopping distance. Calculate the stopping distance required when a car traveling 20 mph, 40 mph, 60 mph, and 60 mph. \r
\n" ); document.write( "\n" ); document.write( "My answers are not coming up correct. Can you explain each step in this problem so I can see what I am doing wrong?
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Algebra.Com's Answer #136573 by ankor@dixie-net.com(22740)\"\" \"About 
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The formula for calculating the braking distance needed when traveling at a certain speed is d=x^2/20 + x, where x is the speed of the car and d is the stopping distance. Calculate the stopping distance required when a car traveling 20 mph, 40 mph, 60 mph, and 60 mph.
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\n" ); document.write( "\n" ); document.write( "d = \"x%5E2%2F20\" + x
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\n" ); document.write( "20 mph:
\n" ); document.write( "d = \"20%5E2%2F20\" + 20
\n" ); document.write( "d = \"400%2F20\" + 20
\n" ); document.write( "d = 20 + 20
\n" ); document.write( "d = 40'
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\n" ); document.write( "60 mph
\n" ); document.write( "d = \"60%5E2%2F20\" + 60
\n" ); document.write( "d = \"3600%2F20\" + 60
\n" ); document.write( "d = 180 + 60
\n" ); document.write( "d = 240'
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\n" ); document.write( "you should be able to do it for 40 mph and 80 mph the same way
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