document.write( "Question 8264: I am trying to help my daughter with her homework but I need help with it here is my question I need to write an expression for the number of kilometers a dolphin travels in d hours swimming ag 8 km/h. Then find the number of kilometers the dolphin travels in 3 hours. Any help would be apprecated.\r
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\n" ); document.write( "cindy
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Algebra.Com's Answer #4551 by Earlsdon(6294)\"\" \"About 
You can put this solution on YOUR website!
It seems as though you are looking for an equation rather than an expression.\r
\n" ); document.write( "\n" ); document.write( "The equation that relates distance (d) to time (t) and rate of travel (r) is:\r
\n" ); document.write( "\n" ); document.write( "\"d+=+rt\" So, in the case of your dolphin, the rate of travel (r) is 8 km/h\r
\n" ); document.write( "\n" ); document.write( "So you (or Cindy) can write:\r
\n" ); document.write( "\n" ); document.write( "\"d+=+%288+km%2Fh%29t\" Now, if the dolphin travels for 3 hours, then t = 3 hrs and you can replace the t in your equation with 3 hrs. So it would look like this:\r
\n" ); document.write( "\n" ); document.write( "\"d+=+%288+km%2Fh%29%283+hrs%29\" and if Cindy can work out the arithmetic, she'll find that:\r
\n" ); document.write( "\n" ); document.write( "\"d+=+24+km\" because 8 km/h times 3 hrs is 24 km.
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