January 2009 SAT Math Discussion

Test Preparation SAT Preparation
281

<p>Once again,</p>

<p>Was 5 a, b, 5 experimental?</p>

282

<p>Supa I dunno I had it too…</p>

283

<p>on the area of pi/sector one, does anyone remember if one of the wrong answers listed was 40?</p>

284

<p>No, the 5,a,b,5 question is not experimental.</p>

285

<p>5, a, b, 5</p>

<p>was NOT experimental. i had this section and not the pentagon/circle one. </p>

<p>also, for this question, a could equal 1 too, right?</p>

<p>5, 1, 5, 5 …</p>

286

<p>@ingette I put the right answer as 40.</p>

<p>@ivy If I recall correctly it said a < 0</p>

287

<p>The right answer to the pi/sector one was 140 degrees. (unless I’m thinking about the wrong question)</p>

288

<p>Right right 140, got it mixed up!</p>

289

<p>@zenythz: no, you’re thinking of the right one. i remember finding “40” but can’t remember whether i was idiotic enough to subtract from 180. i was asking because if “40” wasn’t an option, i knew i probably got it right.</p>

290

<p>iheartivy, the question specifically said those numbers are both negative integers. However, even w/ ur wrong method, you should still get a correct answer, since the correct choice was positive.</p>

291

<p>Wow, I actually feel like I did not too bad…I got all the ones I answered right…unfortunately I omitted way more than I would have like :frowning: I think I omitted like 4 or 5…:frowning: Does anyone know what score that would be approximately?</p>

292

<p>A = 3
d = 11
b = (a + d) / 2
c = (b + d) / 2</p>

<p>b = (3 + 11) / 2 = 7
c = (7 + 11) / 2 = 9</p>

293

<p>Ok, the one about</p>

<p>You survey people</p>

<p>___ people like A and B, ____ people don’t like A nor B, and blank people ONLY like ____ A. How many people ONLY like___B?</p>

<p>I’m pretty sure these statements are mutually exclusive and thus do not fall under any sort of venn diagram. All you have to do is take the initial number and subtract each individually?</p>

294

<p>the only thing stopping me on my path sat math greatness is that tangent line problem. I got 3…someone else here did too…but i used the same method finding the radius slope and doign neg reciprocal-- probably careless error…oh tosh</p>

295

<p>I made a mistake on the quadrants question. I plugged the equation into my graphing calculator and wrote “2x-1” instead of “1-2x”. I have no idea how I made that mistake, but oh well. What’s done is done.</p>

296

<p>@iheartivy</p>

<p>a < 0</p>

<p>However, I believe if you said a = 1 you should get the same answer.</p>

297

<p>yeah thats right the question mark</p>

298

<p>the only thing stopping me on my path sat math greatness is that tangent line problem. I got 3…someone else here did too…but i used the same method finding the radius slope and doign neg reciprocal-- probably careless error…oh tosh


&lt;p&gt;X^2 + Y^2 = 25
X= (-4)?
Radius is 5.
Y is thus = 3&lt;/p&gt;

&lt;p&gt;Slope, rise over run, -3/4. Perpendicular which is negative inverse is 4/3.&lt;/p&gt;
299

<p>@thequestionmark</p>

<p>That is correct. There is no need for a Venn Diagram. They tell you exactly how many liked both, exactly how many only liked A, and exactly how many didn’t like either. None of these groups overlap. Just subtract. You should only get ten people that only liked show B.</p>

300

<p>buddy: If you subtract all the numbers don’t you get 32? I might not be remembering it correctly</p>