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1.(a) I added 18 to 3 times a number, the result
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<p>P=9d+320 </p> <p>797.00=9d+320 </p> <p>797.00-320=9d </p> <p>477=9d </p> <p>477/X=d </p> <p>XX=d </p> <p>XXX of articles is 53 </p> <p>X. D is partly constant XXX partly XXXXXX with V. When V 40, D = XXX and XXXX V = 54, D = XXX. i) Find XXX XXXXXXX connecting X and X. </p> <p>D = XX + X , ( XXXXXX equation y = XX + b) (XX) XXXX X when V= 73. </p> <p>XXXX V=XX, X=XXX XXX = 40m + C ** XXXX V=XX, D=XXX 192 = XXX + C *** subtract ** from *** XX = XXX m = 3 sub XXXX ** , 150 = XXX + X X = 30 X = XX + XX D=X*XX+30=XXX </p> <p>3.(a) A XXXXXXXXXXX tank XXX XXXXXXX XXX XXX a XXXXXXXX of XXXX cm³. XX XXX XXXXXX XXX XXXXXX are equal, XXXXXXXXX the depth of oil in XXX XXXX when full (XXXX X= 22/X) </p> <p>XXXXXX of XXXXXXXX= <img XXX="file:///C:\XXXXX\XXXX\XXXXXXX\Local\Temp\XXXXXXXXXXXX\01\clip_image002.gif" XXX="\pi {r}^{X} h" width="34" height="15"> </p> <p>XXXX <em><b>r</b></em> and <em><b>h</b></em> XXX equal </p> <p>So, <em>XX<XXX>X</sup>×r=XXXX</em> </p> <p><em>πr<sup>X</XXX>=1078</em> </p> <p><em>r<XXX>X</sup>=XXXX/π</em> </p> <p><em>r<sup>3</sup>=XXXX/(XX/X)</em> </p> <p><em>r<sup>3</XXX>=(XXXX/XX)*X</em> </p> <p><em>r<XXX>X</XXX>=XX*X</em> </p> <p><em>r<XXX>X</XXX>=X*X*7</em> </p> <p><em>r<XXX>3</XXX>=X<sup>X</sup></em> </p> <p><em>r=X</em> </p> <p><em>r=7 and h=7</em> </p> <p><em>Therefore, the XXXXX XX XXX tank when XXXX is 7m.</em> </p> <p>(b) Find the perimeter XX a rectangular field which XX 10m by XX. </p> <p><span class="formulacss"><i>XXXXXX (l) = 10cm</i></span> <span XXXXX="formulacss"><i>Width (w) = 5cm</i></span> <span XXXXX="formulacss">Perimeter of XXX rectangle = 2(l + w) XXXXX </span> <span class="formulacss"><i>X = 2(10 + X)</i></span> <span class="XXXXXXXXXX"><i>P = X (15)</i></span> <span XXXXX="XXXXXXXXXX"><i>X = XX</i></span> <span class="XXXXXXXXXX">Thus, the XXXXXXXXX XX XXX XXXXXXXXX is XX m.</span><br> <br> </p> <p>X.XXXXX the equation: X-4-X/5=-X/2 </p> <figure><img src="XXXXX://XXXXXXXXXXXX.XX.amazonaws.com/media/attachments/790Xva.JPG" XXXX-XX="https://XXXXXXXXXXXX.s3.XXXXXXXXX.XXX/XXXXX/attachments/790Xva.JPG"></XXXXXX><p><XXX XXX="file:///C:\XXXXX\user\XXXXXXX\Local\XXXX\msohtmlclip1\XX\XXXXXXXXXXXXX.jpg" width="XXX" XXXXXX="34"> </p><img src="XXXX:///C:\XXXXX\user\AppData\XXXXX\XXXX\msohtmlclip1\XX\XXXXXXXXXXXXX.gif" width="120" XXXXXX="XXX"> <XXXXXX><XXX XXX="XXXX:///C:\XXXXX\user\AppData\XXXXX\XXXX\XXXXXXXXXXXX\XX\clip_image008.XXX" width="XX" height="23"></figure><p> </p> <p> </p>">
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