911.. test tomorrow.. math genius needed

Archive SAT Subject Test Preparation
21

<h1>49</h1>

<p>I feel like it is 20,000 because 150^2 - 50^2= 20,000 </p>

<h1>50</h1>

<p>Just sketch it. Add the triangles together.</p>

<p>Moving Clockwise: (0.5)(3<em>8) + (0.5)(3</em>4) + (0.5)(6<em>4) + (0.5)(6</em>8)</p>

<p>Also, rotate them so I don’t have too.</p>

22

<p>no i did .5(9)(12)</p>

<p>u know rhombus </p>

<p>and THANK YOU really :)</p>

23

<p>i don’t get it…
the question is :
what is the odd integers between 100 and 300…
so isn’t it supposed to be "101+103+104…+209 "</p>

<p>?!?!!?!</p>

<p>who said anything about integers between 0 and 100 or 0 and 300?!</p>

24

<p>Since sum of first n positive odd integers = n^2, you need to: </p>

<p>(# of positive odd integers less than 300)^2 - (# of positive odd integers less than 100)^2</p>

<p>to find the sum of the odd integers between the two. You can’t just add them up easily. You should use the relation they give. </p>

<p>I think…</p>

25

<p><a href=“Dropbox - Error - Simplify your life”>https://www.dropbox.com/s/h9nmu8vvniym4yh/010620132011.jpg?m&lt;/a&gt;&lt;/p&gt;

<p>i hope this is the last one :P</p>

26

<p>I answered this in post 15.</p>

<p>

</p>

27

<p>omG… wrong pic sorry!</p>

28

<p>My book never said anything about differentiating… do they REALLY test this on the Level 1?</p>

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<p><a href=“Dropbox - Error - Simplify your life”>https://www.dropbox.com/s/cmuxjjkmql7b1c1/010620132012.jpg?m&lt;/a&gt;&lt;/p&gt;

<p><a href=“Dropbox - Error - Simplify your life”>https://www.dropbox.com/s/ylvhp9yycj6oito/010620132013.jpg?m&lt;/a&gt;&lt;/p&gt;

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<p>

</p>

<p>They don’t. That earlier problem could have been solved through use of a graphing calculator.</p>

31

<p>2200</p>

<p>for the second link:
[Math</a> SAT level (IC) question? - Yahoo! Answers](<a href=“Yahoo | Mail, Weather, Search, Politics, News, Finance, Sports & Videos”>Yahoo | Mail, Weather, Search, Politics, News, Finance, Sports & Videos)</p>