document.write( "Question 407389: Lauren drove her car for 3 hours in a dust storm. When the skies cleared, she increased her speed by 30 miles per hour and drove for 4 more hours, completing her 295-mile trip. How fast did she travel during the dust storm? \n" ); document.write( "
Algebra.Com's Answer #287248 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Lauren drove her car for 3 hours in a dust storm.
\n" ); document.write( " When the skies cleared, she increased her speed by 30 miles per hour and drove
\n" ); document.write( " for 4 more hours, completing her 295-mile trip.
\n" ); document.write( " How fast did she travel during the dust storm?
\n" ); document.write( ":
\n" ); document.write( "Let s = the slower speed
\n" ); document.write( "then
\n" ); document.write( "(s+30) = the faster speed
\n" ); document.write( ":
\n" ); document.write( "Write a distance equation, Dist = time * speed
\n" ); document.write( ":
\n" ); document.write( "Slow dist + fast dist = 295 mi
\n" ); document.write( "3s + 4(s+30) = 295
\n" ); document.write( ":
\n" ); document.write( "3s + 4s + 120 = 295
\n" ); document.write( "7s = 295 - 120
\n" ); document.write( "s = \"175%2F7\"
\n" ); document.write( "s = 25 mph is the dust storm speed
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check the solution by finding the dist at each speed
\n" ); document.write( "3(25) + 4(55) =
\n" ); document.write( "75 + 220 = 295 \n" ); document.write( "
\n" );