document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1164339>Question 1164339</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, can you check my answers please? Thank you!\r<BR>\n" );
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document.write( "1. The packaging lists a model car’s length as 5.4 cm. It gives the scale factor as 1:72. What is the length of<BR>\n" );
document.write( "the actual car?<BR>\n" );
document.write( "a. 3.9 m --> my answer<BR>\n" );
document.write( "b. 7.5 m<BR>\n" );
document.write( "c. 13.3m<BR>\n" );
document.write( "d. 5.6 m\r<BR>\n" );
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document.write( "2. Find a single translation that has the same effect as each composition of translations. (x, y) → (x + 3, y  -  2)<BR>\n" );
document.write( "followed by (x, y) → (x  -  4, y  -  1).<BR>\n" );
document.write( "a. (x, y) → (x  -  7, y + 1)<BR>\n" );
document.write( "b. (x, y) → (x  -  1, y  -  3)<BR>\n" );
document.write( "c. (x, y) → (x + 1, y  -  5) --> my answer<BR>\n" );
document.write( "d. (x, y ) → (x + 1, y  -  1)\r<BR>\n" );
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document.write( "3. You are given the following coordinates.A(3, 7), B(  -  2, 1), C(2, 0) and D(5,  -  6). <BR>\n" );
document.write( "Find the coordinates of the image after a reflection across x = 3.<BR>\n" );
document.write( "a. A’(3, 7), B’(  -  8, 1), C’(4, 0), D’(1, 6)<BR>\n" );
document.write( "b. A’(3, 7), B’(8, 1), C’(4, 0), D’(1,  -  6)<BR>\n" );
document.write( "c. A’(3,  -  1), B’(  -  2, 5), C’(2, 6), D’(5, 12) --> my answer<BR>\n" );
document.write( "d. A’(7, 3), B’(  -  8, 1), C’(0, 4), D’(  -  1,  -  6)\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #788699 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=788699\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. The packaging lists a model car’s length as 5.4 cm. It gives the scale factor as 1:72. What is the length of<BR>\n" );
document.write( "the actual car?\r<BR>\n" );
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document.write( "5.4 * 72 / 100 = 3.888 = 3.9 looks good.\r<BR>\n" );
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document.write( "2. Find a single translation that has the same effect as each composition of translations. (x, y) → (x + 3, y - 2)<BR>\n" );
document.write( "followed by (x, y) → (x - 4, y - 1).\r<BR>\n" );
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document.write( "you go from x to x + 3 to x + 3 - 4 should wind you up with x - 1<BR>\n" );
document.write( "you go from y to y - 2 to y - 2 - 1 should wind you up with y - 3<BR>\n" );
document.write( "i think answer should be selection b.\r<BR>\n" );
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document.write( "assuming you were at (0,0)<BR>\n" );
document.write( "(0+3,0-2) will get you to (3,-2)<BR>\n" );
document.write( "(3-4,-2-1) will get you to (-1,-3)\r<BR>\n" );
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document.write( "3. You are given the following coordinates.A(3, 7), B( - 2, 1), C(2, 0) and D(5, - 6).<BR>\n" );
document.write( "Find the coordinates of the image after a reflection across x = 3.\r<BR>\n" );
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document.write( "i believe selection b is correct.\r<BR>\n" );
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document.write( "(3,7) has x = 3, so it remains the same.<BR>\n" );
document.write( "(-2,1) has x = -2 which is 5 below 3, so you need to go 5 above 3 to get to (8,1)<BR>\n" );
document.write( "(2,0) has x = 2 which is 1 below 3, so you need to go to 1 abvoe 3 to get to (4,0)<BR>\n" );
document.write( "(5,-6) has x = 5 which is 2 above 3, so you need to go to 2 below 3 to get to (1,-6)\r<BR>\n" );
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document.write( "all the y coordinates remain the same.<BR>\n" );
document.write( "the reflection involves the x coordinate only.\r<BR>\n" );
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