document.write( "Question 946347: A car travel for a total of 14 hours. The car averages 70 miles per hour for y hours and averages 55 miles per hour for the rest of the time. Express the total distance traveled by the car in terms of y. \n" ); document.write( "
Algebra.Com's Answer #577328 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! A car travel for a total of 14 hours. \n" ); document.write( " The car averages 70 miles per hour for y hours and averages 55 miles per hour for the rest of the time. \n" ); document.write( " Express the total distance traveled by the car in terms of y. \n" ); document.write( ": \n" ); document.write( "From the information given, we know \n" ); document.write( "Car 1 averaged 70 mph for y hrs \n" ); document.write( "then, since the total travel time is 14 hrs, \n" ); document.write( "car 2 averages 55 mph for (14-y) hrs \n" ); document.write( ": \n" ); document.write( "dist = speed * time \n" ); document.write( ": \n" ); document.write( "d(y) = 70y + 55(14-y) \n" ); document.write( "d(y) = 70y + 770 - 55y \n" ); document.write( "d(y) = 70y - 55y + 770 \n" ); document.write( "d(y) = 15y + 770 \n" ); document.write( " |