document.write( "Question 363774: help please!\r
\n" );
document.write( "\n" );
document.write( "a trapezoid has an area of 185d^2 sq. meters and a height of 15d meters. the lower base is 10 more than the upper base. find the length of the upper base. \n" );
document.write( "
Algebra.Com's Answer #259431 by amoresroy(361)![]() ![]() You can put this solution on YOUR website! Let x = length of upper base \n" ); document.write( " \n" ); document.write( "Area = h * (upper base + lower base)/2\r \n" ); document.write( "\n" ); document.write( "15d * (x + x + 10)/2 = 185d\r \n" ); document.write( "\n" ); document.write( "Multiply both sides by 2/15\r \n" ); document.write( "\n" ); document.write( " 2x + 10d = 185d (2/15) \n" ); document.write( " 2x = 24.67d - 10d \n" ); document.write( " 2x = 14.67d \n" ); document.write( " x = 7.33d \n" ); document.write( " |