document.write( "Question 989701: The area of the surface of the swimming pool is 210 square feet. The width is 10 ft. and the length is 9 + d ft. What is the length d? \n" ); document.write( "
Algebra.Com's Answer #609935 by macston(5194)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "L=length; W=width; A=area \n" ); document.write( ". \n" ); document.write( "A=LW \n" ); document.write( "210=(9+d)(10) \n" ); document.write( "21=9+d \n" ); document.write( "12=d \n" ); document.write( "ANSWER: d=12 feet \n" ); document.write( " |