document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1107863>Question 1107863</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose that speeding fines are determined by the linear function <BR>\n" );
document.write( "&#8203;f(x)= 10 (x-65)+50,xgreat then65, where&#8203; f(x) is the cost in dollars of the fine if a person is caught driving x miles per hour. <BR>\n" );
document.write( "&#8203;(a) Radar clocked a driver at 76 mph. How much was the&#8203; fine?<BR>\n" );
document.write( "&#8203;(b) While balancing his&#8203; checkbook, a person ran across a canceled check that his wife had written to the Department of Motor Vehicles for a speeding fine. The check was written for&#8203; $100. How fast was his wife&#8203; driving?\r<BR>\n" );
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document.write( "&#8203;(c) At what&#8203; whole-number speed are tickets first&#8203; given?\r<BR>\n" );
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document.write( "&#8203;(d) For what speeds is the fine greater than&#8203; $200?\r<BR>\n" );
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document.write( "(a) The fine was $ </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #722889 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=722889\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose that speeding fines are determined by the linear function <BR>\n" );
document.write( "f(x)= 10 (x-65)+50,(x greater then 65), where f(x) is the cost in dollars of the fine if a person is caught driving x miles per hour. <BR>\n" );
document.write( "(a) Radar clocked a driver at 76 mph. How much was the fine?<BR>\n" );
document.write( "f(76) = 10(76-65)+50 = $160.00<BR>\n" );
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document.write( "&#8203;(b) While balancing his checkbook, a person ran across a canceled check that his wife had written to the Department of Motor Vehicles for a speeding fine. The check was written for $100. How fast was his wife driving?<BR>\n" );
document.write( "100 = 10(x-65)+50<BR>\n" );
document.write( "50 = 10(x-65)<BR>\n" );
document.write( "5 = x-65<BR>\n" );
document.write( "x = 70 mph<BR>\n" );
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document.write( "(c) At what whole-number speed are tickets first given?<BR>\n" );
document.write( "10(x-65)+50 >= 0<BR>\n" );
document.write( "x-65 > - 5<BR>\n" );
document.write( "x >= 70<BR>\n" );
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document.write( "(d) For what speeds is the fine greater than $200?<BR>\n" );
document.write( "10(x-65)+50 > 200<BR>\n" );
document.write( "x-65 > 15<BR>\n" );
document.write( "x > 80 mph<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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