document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1079082>Question 1079082</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The Murphy family and the Perez family each used their sprinklers last summer. The water output rate for the Murphy family's sprinkler was <BR>\n" );
document.write( "25L<BR>\n" );
document.write( " per hour. The water output rate for the Perez family's sprinkler was <BR>\n" );
document.write( "30L<BR>\n" );
document.write( " per hour. The families used their sprinklers for a combined total of <BR>\n" );
document.write( "40<BR>\n" );
document.write( " hours, resulting in a total water output of <BR>\n" );
document.write( "1125L<BR>\n" );
document.write( ". How long was each sprinkler used? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #693454 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=693454\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The rate of Perez family water usage = 25 l/h; the rate of Murphy family water usage = 30 l/h<BR>\n" );
document.write( "Let P = the amount of time the Perez family sprinkler was on.<BR>\n" );
document.write( "Then 40 - P is the amount of time the Murphy's sprinkler was on.<BR>\n" );
document.write( "The total amount of water used is:<BR>\n" );
document.write( "25*P + 30(40-P) = 1125<BR>\n" );
document.write( "Solving for P gives P = 15 hours<BR>\n" );
document.write( "Thus the Murphy family used their sprinkler for 25 hours<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );