document.write( "Question 885098: A plane can fly 1020 miles in the same time as it takes a car to go 360 miles. If the car travels 110 mph slower than the plane, find the speed of the plane \n" ); document.write( "
Algebra.Com's Answer #534938 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! A plane can fly 1020 miles in the same time as it takes a car to go 360 miles. If the car travels 110 mph slower than the plane, find the speed of the plane \n" ); document.write( ". \n" ); document.write( "Let x = speed of plane \n" ); document.write( "then x-110 = speed of car \n" ); document.write( ". \n" ); document.write( "1020 = xt (applying d=rt for plane -- equation 1) \n" ); document.write( "360 = (x-110)t (applying d=rt for car -- equation 2) \n" ); document.write( "solve equation 1 for t \n" ); document.write( "t = 1020/x \n" ); document.write( "substitute into equation 2 to solve for x: \n" ); document.write( "360 = (x-110)t \n" ); document.write( "360 = (x-110)(1020/x) \n" ); document.write( "360x = (x-110)1020 \n" ); document.write( "360x = 1020x-112200 \n" ); document.write( "360x = 1020x-112200 \n" ); document.write( "-660x = -112200 \n" ); document.write( "x = 170 mph (speed of plane) \n" ); document.write( " \n" ); document.write( " |