Math Level 2 Questions

Test Preparation SAT Subject Test Preparation
1

<ol>
<li><a href="http://s22.postimg.org/o3a8n9jep/question.png%5B/url%5D"&gt;http://s22.postimg.org/o3a8n9jep/question.png&lt;/a> <--how is this (A) and not (E)? Doesn't the range include 5?</li>
<li><a href="http://s12.postimg.org/4hzexojkt/question2.png%5B/url%5D"&gt;http://s12.postimg.org/4hzexojkt/question2.png&lt;/a> (C)</li>
<li><a href="http://s12.postimg.org/9a9894e8t/question3.png%5B/url%5D"&gt;http://s12.postimg.org/9a9894e8t/question3.png&lt;/a> (B) <--please explain</li>
<li><a href="http://s12.postimg.org/key6uebz1/question4.png%5B/url%5D"&gt;http://s12.postimg.org/key6uebz1/question4.png&lt;/a> (B) </li>
<li><a href="http://s12.postimg.org/j8u6vlnod/question5.png%5B/url%5D"&gt;http://s12.postimg.org/j8u6vlnod/question5.png&lt;/a> (D)</li>
<li><a href="http://s12.postimg.org/l1x3jx8v1/question6.png%5B/url%5D"&gt;http://s12.postimg.org/l1x3jx8v1/question6.png&lt;/a> (D)</li>
<li><a href="http://s12.postimg.org/pp35low7x/question7.png%5B/url%5D"&gt;http://s12.postimg.org/pp35low7x/question7.png&lt;/a> (C)</li>
<li><a href="http://s12.postimg.org/awyfucqal/question8.png%5B/url%5D"&gt;http://s12.postimg.org/awyfucqal/question8.png&lt;/a> (C) <--explain</li>
<li><a href="http://s12.postimg.org/bnr604snx/question9.png%5B/url%5D"&gt;http://s12.postimg.org/bnr604snx/question9.png&lt;/a> (C)</li>
<li><a href="http://s12.postimg.org/lmh6jq8f1/question10.png%5B/url%5D"&gt;http://s12.postimg.org/lmh6jq8f1/question10.png&lt;/a> (E)</li>
<li><a href="http://s12.postimg.org/juj5rpiql/question11.png%5B/url%5D"&gt;http://s12.postimg.org/juj5rpiql/question11.png&lt;/a> (D)</li>
<li><a href="http://s27.postimg.org/8oy7s00bn/question.png%5B/url%5D"&gt;http://s27.postimg.org/8oy7s00bn/question.png&lt;/a> <-- How is Q.48 not (E)? it's so confusing. :/ </li>
</ol>

<p>These are from Sparknotes Practice tests. I'm finding these trickier than Barron's tests, which I found to be more straightforward.</p>

<p>Answer what you can! </p>

<p>Thank youu</p>

2

<ol>
<li>(x-y)/r is the same as x/r - y/r.
According to the figure, x is the adjacent, and r is hypotenuse and y is opposite
So x/r is adjacent/hypotenuse which is a/h which is cos(theta) (SOHCAHTOA rule)
And y/r is opposite/hypotenuse which is o/h which is sin(theta)
so x/r - y/r is cos(theta) - sin (theta) (B)</li>
</ol>

3

<ol>
<li>I guess it doesn’t include 5 because of the open (not completely black) point, which means it’s not included. Well but I may be wrong.</li>
</ol>

4

<p>You’re right about Q1 I didn’t notice the hole. :confused:
Q18, of couurse! I just don’t think sometimes!</p>

<p>Thank you, good luck to you :)</p>

5

<p>For the last question is D the answer ? The first equation does not include all positive numbers because it starts from +2</p>

6

<p>Q48. E
Q49. E</p>

<p>But I can’t figure them out.</p>

7

<p>Why isn’t #1 B? It’s non inclusive for -5 and 5…</p>

<h1>12 is most definitely A. Try values.</h1>

8

<h1>3, rcos0 = x, rsin0=y, r gets canceled you are left with cos0 - sin0</h1>

9

<p>For question one, why is the range written in the form of coordinates?</p>

10

<p>Question 5 is b not d</p>

11

<p>Agreed.</p>

<p>F^-1 (x) = x/2</p>

<p>G (x) = 3x + 6</p>

<p>F (G (x))= 3x/2 + 3</p>

12

<p>Somebody please explain number 8…the dude by the username miter, please help… wouldn’t it be 1/4? if the coin, we assume, lands heads the first two times?</p>

13

<p>It landed heads up ‘more than’ twice, so at least three times.</p>

14

<p>Yeah, I can’t figure out the arithmetic sequence one. Crap</p>

15

<p>At first was also confused but for I looked for an answer.</p>

<p>For Q8</p>

<p>You have THHH, HTHH, HHTH, HHHT…
HHHH is what you are interested in, thats 1/5.</p>

16

<p>Crap…I feel stupid. These questions are really hard… No wonder there is such a generous curve on the Math 2 exam.</p>

17

<p>Lol yeah I know, I’m doing physics as well, I’m not even done studying</p>

18

<p>These are cake guys…</p>

<h1>8 is A. When outcomes are independent you multiply the probability of each event. Check the Sparknotes page on SAT Math II Probability.</h1>

19

<p>Someone doesn’t understand conditional probability^</p>

20

<h1>1 is for sure B. A cannot be the answer b/c it includes -5.</h1>