<p>I have problems on a few questions. i have checked the explanations on the cb site but i stil do not undersantd.
Test 4 Section 6 #15-18</p>
<p>How do you do number 15 and 16 and18?</p>
<p>I understand the concept of 17 but how would i have known to use 8 for n? why not 7 or another number?</p>
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<li><p>I completed this problem by giving the sides of the triangles values.
QS = 1, QV = 3, PT = 3, PR = 4.</p>
<p>Area of PST = 3 Area of PQR = 6. So… 3/6 = 1/2.</p></li>
<li><p>Plug in 2m in the equation and move all terms to one side. You will get m^2 - 9m +
14 = 0. Factor, and you will be left with (m - 2)(m-7) = 0. m = 2 or 7.</p></li>
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<li>Calculate the number of ticks per check mark and add the numbers together. So it would be 80 + 20 + 40 + 3 + 6. = 149 chimes.</li>
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<p>-About n, it says it chimes n times on the nth hour. From 7:14-8:45 the clocks with that attribute will chime 8 times at 8 o’clock.</p>
<p>but then cant it chime 7 yimes on the 7th hour which would make it zero chimes?</p>
<p>The clock does not hit 7 o’clock (or the 7th hour) during that time interval, so no.</p>
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<li>(sorry, forgot about that) You subtract the choices when the card is at either end from the total number of arrangements so its <<<5! - 2(4!).>>></li>
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