document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1123094>Question 1123094</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A store has two different coupons that customers can use. One coupon gives the customer $25 off their purchase, and the other coupon gives the customer 20% off of their purchase. Suppose they let a customer use both coupons and choose which coupon gets applied first. For this context, ignore sales tax. <BR>\n" );
document.write( "Let f be the function that inputs a cost (in dollars) and outputs the cost after applying the \"$25 off\" coupon, and let g be the function that inputs a cost (in dollars) and outputs the cost after applying the \"20% off\" coupon. \r<BR>\n" );
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document.write( "a. Suppose a customer wants to purchase a $140 item and apply the \"$25 off\" coupon first, and then the \"20% off\" coupon. How much will the item cost after applying the coupons?\r<BR>\n" );
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document.write( "b. Suppose a customer wants to purchase a $140 item and apply the \"$25 off\" coupon first, and then the \"20% off\" coupon. Use function notation to represent how much the item will cost (dollars) after applying the coupons.\r<BR>\n" );
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document.write( "c. Suppose a customer wants to purchase a $140 item and apply the \"20% off\" coupon first, and then the \"$25 off\" coupon. How much will the item cost after applying the coupons?\r<BR>\n" );
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document.write( "d. Suppose a customer wants to purchase a $140 item and apply the \"20% off\" coupon first, and then the \"$25 off\" coupon. Use function notation to represent how much the item will cost (dollars) after applying the coupons. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #739346 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=739346\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a. 25% of 140 =$35 so $105 left, and 20% or that is $21, so $84 is the cost.<BR>\n" );
document.write( "b. f(C)=[(140-(140*0.25))]*0.80, here instead of subtracting the 20% discount, one can multiply by 80% of the cost.<BR>\n" );
document.write( "c. 20% of $140 is $28 and $112 is left.  Take 25% of that and get $28, and the cost is $84.<BR>\n" );
document.write( "d. f(C)=0.75{140-(0.20*140)] </SPAN>\n" );
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