November 2008 SAT Subject Test: Math Level 2

Test Preparation SAT Subject Test Preparation
241

<p>Here is a consolidated list of the thread</p>

<p>Note: ** * ** denotes "DISPUTED" or unsolved/disputed throughout the thread. Bolded in disputed answer means the more supported answer of the two.
** ? ** denotes "w/o support", not discussed at length and was supported by only 1 person </p>

<p>IN NO PARTICULAR ORDER: </p>

<p>arithmetic series of third term & seventh term, 6th term 23, 2nd term 7: 11 (D)</p>

<p>x^2+2x+4=(x+2)^2+a(x+2)+b,find a: answer: -2</p>

<p>?f(f(x)) = -x </p>

<p>? ln (#) = ? ?</p>

<p>? Donuts problem: as the dollar amount,p, increased, d decreased by -26.97 </p>

<p>? Babysitting: (32.5-2x)/3.5</p>

<p>? 2x+4 or something like that for -1000 function question: ?</p>

<p>what is g(x) graph in terms of f(x): |f(-x)|</p>

<p>Ratio of sphere w/ r and sphere w/ 2r: 1:8</p>

<p>Sum of zeros, find recip 1/x + 1/y: answer: 0.5 (1/2)</p>

<p>f(1) = -2, f(-1) = 3, find f(4): answer eq y=-2.75x -0.25: answer 11.25 (-?)</p>

<p>Polar equation graph with circle and angle 3rd quadrant, eq of circle x^2+y^2 =5: 206.6</p>

<p>n! divisible by 9 if and only if n >- 6 (greater or equal t</p>

<p>*(x^2-25/x^2-5x) undefined at x value: x=5, or **x=5,0<a href="does%200/0%20make%20it%20undefined">/B</a>?</p>

<p>equi lat triangle P=6: 1, -rt 3</p>

<p>y>2x^2-1: (1,2)</p>

<p>Period of |sin x|: answer 2pi or **pi*</p>

<p>csc x & tan x problem in pi/2 <theta< pi = -.57</p>

<p>Max on [-2,4] of function: -2</p>

<p>Donuts prob: d=-24.37p+273.
For every $1 increase in p, d decreases by 24.37.</p>

<p>Sum of positive integers 1+2+3+4...225: 113 (<a href="http://talk.collegeconfidential.com/1061216571-post128.html%5B/url%5D"&gt;http://talk.collegeconfidential.com/1061216571-post128.html&lt;/a&gt;)&lt;/p>

<p>cos f(x) = sin x: pi/2 - theta (cofunc ident)</p>

<p>*Rotation around XY of tri to cone: 1500 pi or 2000 pi</p>

<p>Sum of inf geometric sequence 1/(5)^x = 2.25 (2 1/4 on test)</p>

<p>f(x+2) graph shift left: y-inter (0,4)</p>

<p>Similiar triangles sin A/sin B : 3</p>

<p>*Boxplot graph, I - greater means A>b, II - standard dev, III - range: either I only or I & III</p>

<p>(x-3)^2 + y^2 =11. (x+2)^2 + y^2 = r^2.: answer: 1.68 rounds to 1.7</p>

<p>find NON-NEG productive of zeros: answer: Non Negative product of zeros is x(x+6) b/c 0 times -6 is 0, which is a Non Negative number.</p>

<p>probability question about numbers whose sum is 10 and product is 20: 1/2 (ab=20 and a+b)</p>

<ol>
<li><p>Probability -1<x<1: pi/4</p></li>
<li><p>Parallelogram question: 53</p></li>
</ol>

242

<p>So.. what's the minimum RAW score that you can get and still have 750 or 760+? So far, I think I may have 2-3 wrong, and I have 5 omits. So hopefully I'm looking at a 40+ raw.. MAYBE.. bleh. But what's the minimum for 750+?</p>

<p>Two contradictions:</p>

<p>"n! divisible by 9 if and only if n >- 9 (greater or equal to)" Wasn't the answer n>=6, not 9?</p>

<p>"(x^2-25/x^2-5x)" Isn't that undefined at 5 AND 0?</p>

<p>(x+5)(x-5)/(x)(x-5), so 5 AND 0....</p>

243

<p>Maybe 9 blank or 10 wrong? Not sure :/</p>

244

<p>x(x+6) for one with NON-Negative product of zeros.</p>

245

<p>Anyone remember what number the problem that asks you to solve for a while it gives you an equation like x^2 +5x= (x01)^2 +a + b was? Like 35?</p>

246

<p>the n! was >=6 not >=9</p>

247

<p>^ Do you remember the answer? I just remembered the zeros were neg that's all.</p>

248

<p>the answer to baby-sitting question was (32.5-2x)/3.5</p>

<p>period of absvalue(sinx) was pi</p>

<p>rotation 1500 pi</p>

<p>function is undefined at x= 0 and 5</p>

249

<p>Yes UT, it was >= 6 without a doubt</p>

250

<p>Fixed above*. Can you guys help with the ? problems?</p>

251

<p>Yeah it's >=6 since 6! is 6 5 4 3 2 1 and it's divisible by 9 because 6= 3 x 2 and with the other 3 can cancel out with 9.</p>

252

<p>Your wrong about 50. The answer is for a probability question about numbers whose sum is 10 and product is 20.</p>

<p>Answer to question 50 was 53, it was about the slanted leg of a parallelgram with 75 on the bottom and 50 on the top, with a 45 degree angle.</p>

253

<p>@What's your basis for pi? I thought since the abs value was reflected, it would count as the same period. Plus 2pi/1 = 2pi.</p>

<p>@ For that one, does 0/0 make it still undefined?</p>

254

<p>Well, consider the fact the 6 x 3 = 18 (aka 9 x 2) so the rest of the factorial is a set of integers x 18 (which equals 9 x 2).....</p>

255

<p>the Non Neg was x(x+6) because the zeros are 0 and -6 and the product is 0, which is a non negative number.</p>

256

<p>^ Thanks futureEE, edited the probability/parallelogram</p>

257

<p>@lolilaughed
yes...although its not an asymptote its just a hole in the graph. .</p>

258

<p>^^ I'm pretty sure 0/0 is undefined, still a 0 in the denominator, so the answer is 5 and 0 for that one, I think.</p>

<p>Also, lolilaughed, graph it. You'll see the period changes to pi.</p>

259

<p>With the absolute value thing, the function's period gets cut in half. Image:Rectified</a> waves.png - Wikipedia, the free encyclopedia</p>

<p>I'm pretty sure x/0 = undefined while 0/x is defined as zero, making either zero or five defined, I'd need to see the exact function to remember which one WAS actually defined as 0.</p>

260

<p>Anyone remember what number the problem that asks you to solve for a while it gives you an equation like x^2 +5x= (x01)^2 +a + b was? Like 35?</p>