document.write( "Question 1166935: A concrete mixer needs to know how wide to make a walk around a rectangular fountain that is 10 by 15 feet. There is enough concrete to cover 200 square feet. To the nearest tenth of a foot, how wide should the walk be in order to use up all the concrete?\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #791493 by ikleyn(52786)\"\" \"About 
You can put this solution on YOUR website!
.
\n" ); document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "The outer dimensions of the walkway are 10+2x by 15+2x feet, where x is the uniform width of the walkway.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "So for the area of the walkway we have this equation\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "    (1+2x)*(15+2x) - 10*15 = 200.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "It can be reduced to the quadratic equation\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "    4x^2 + 32x - 199 = 0.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Solve it using the quadratic formula.\r\n" );
document.write( "
\r
\n" ); document.write( "\n" ); document.write( "--------------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "To see many other similar solved problems,  look into the lesson\r
\n" ); document.write( "\n" ); document.write( "    - Problems on the area and the dimensions of a rectangle surrounded by a strip\r
\n" ); document.write( "\n" ); document.write( "    - Cynthia Besch wants to buy a rug for a room \r
\n" ); document.write( "\n" ); document.write( "    - Problems on a circular pool and a walkway around it\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Also,  you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The referred lesson is the part of this online textbook under the topic
\n" ); document.write( "\"Dimensions and the area of rectangles and circles and their elements\".\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );