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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>XXX.XX-XXX=9d </p> <p>477=XX </p> <p>477/X=d </p> <p>53=d </p> <p>The of articles is XX </p> <p>2. D XX XXXXXX constant and partly varies XXXX X. When V XX, D = 150 XXX when X = 54, D = XXX. i) XXXX XXX formula XXXXXXXXXX D and X. </p> <p>X = mV + C , ( XXXXXX XXXXXXXX y = mx + b) (ii) Find D XXXX X= 73. </p> <p>When X=40, D=150 XXX = XXX + C ** When X=XX, X=XXX XXX = 54m + C *** XXXXXXXX ** XXXX *** XX = 14m m = X XXX XXXX ** , 150 = 120 + X C = XX D = XX + 30 X=3*73+30=249 </p> <p>3.(a) X XXXXXXXXXXX tank for storing XXX XXX a XXXXXXXX XX XXXX XXX. If its XXXXXX XXX XXXXXX XXX equal, XXXXXXXXX XXX depth of oil in XXX tank XXXX XXXX (Take X= 22/X) </p> <p>XXXXXX of XXXXXXXX= <img XXX="XXXX:///X:\Users\user\XXXXXXX\Local\Temp\XXXXXXXXXXXX\XX\clip_image002.gif" XXX="\pi {r}^{2} h" width="34" height="15"> </p> <p>XXXX <em><b>r</b></em> and <em><b>h</b></em> are XXXXX </p> <p>So, <em>XX<XXX>X</sup>×r=XXXX</em> </p> <p><em>πr<XXX>X</XXX>=XXXX</em> </p> <p><em>r<sup>X</XXX>=XXXX/X</em> </p> <p><em>r<sup>3</sup>=XXXX/(XX/7)</em> </p> <p><em>r<sup>3</sup>=(XXXX/22)*X</em> </p> <p><em>r<XXX>3</XXX>=49*X</em> </p> <p><em>r<XXX>3</sup>=X*7*X</em> </p> <p><em>r<sup>3</XXX>=7<sup>3</XXX></em> </p> <p><em>r=X</em> </p> <p><em>r=7 XXX h=X</em> </p> <p><em>Therefore, the XXXXX XX oil tank when full is 7m.</em> </p> <p>(b) XXXX XXX XXXXXXXXX of a XXXXXXXXXXX XXXXX XXXXX XX 10m XX XX. </p> <p><span class="XXXXXXXXXX"><i>Length (l) = XXXX</i></span> <span XXXXX="XXXXXXXXXX"><i>XXXXX (w) = 5cm</i></span> <span class="formulacss">Perimeter of XXX rectangle = X(l + w) XXXXX </span> <span XXXXX="formulacss"><i>X = 2(XX + X)</i></span> <span XXXXX="formulacss"><i>X = X (XX)</i></span> <span XXXXX="XXXXXXXXXX"><i>X = XX</i></span> <span class="XXXXXXXXXX">XXXX, the perimeter of XXX rectangle is 30 m.</span><br> <XX> </p> <p>X.Solve XXX XXXXXXXX: X-X-2/5=-X/2 </p> <XXXXXX><img src="XXXXX://XXXXXXXXXXXX.s3.XXXXXXXXX.com/media/XXXXXXXXXXX/XXXXXX.XXX" XXXX-XX="https://schoolsolver.s3.XXXXXXXXX.XXX/media/XXXXXXXXXXX/790Xva.XXX"></XXXXXX><p><XXX src="file:///X:\XXXXX\user\AppData\XXXXX\Temp\msohtmlclip1\XX\XXXXXXXXXXXXX.XXX" width="101" XXXXXX="XX"> </p><img src="file:///C:\Users\XXXX\AppData\XXXXX\XXXX\msohtmlclip1\XX\clip_image006.XXX" width="XXX" height="300"> <XXXXXX><img src="XXXX:///C:\Users\XXXX\AppData\XXXXX\XXXX\msohtmlclip1\XX\XXXXXXXXXXXXX.XXX" width="12" XXXXXX="XX"></figure><p> </p> <p> </p>">
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