document.write( "Question 1187558: How do I find the average rate of speed for f(x)=5x^2+7 over the interval [x,x+h]
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\n" ); document.write( "I got 5h+10x but i do not think I am right \n" ); document.write( "

Algebra.Com's Answer #818561 by greenestamps(13200) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "The average is the change in y (or f(x)) divided by the change in x:

\n" ); document.write( " $\"%28f%28x%2Bh%29-f%28x%29%29%2F%28%28x%2Bh%29-x%29+=+%28f%28x%2Bh%29-f%28x%29%29%2Fh\"$

\n" ); document.write( " $\"%28%285%28x%2Bh%29%5E2%2B7%29-%285x%5E2%2B7%29%29%2Fh\"$
\n" ); document.write( " $\"%285%28x%5E2%2B2hx%2Bh%5E2%29%2B7-5x%5E2-7%29%2Fh\"$
\n" ); document.write( " $\"%285x%5E2%2B10hx%2B5h%5E2%2B7-5x%5E2-7%29%2Fh\"$
\n" ); document.write( " $\"%2810xh%2B5h%5E2%29%2Fh\"$
\n" ); document.write( " $\"10x%2B5h\"$

\n" ); document.write( "Your answer is correct.

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