PSAT 2010 Discussion (Form W)

<p>Discussion for form Dubya. Remember you cannot discuss any of the questions on the test, at least, not yet...</p>

<p>did anyone notice the huge amounts of “E” answers near the end of the writing section? i think it was like 3 in a row then another 2 in a row.</p>

<p>No. I got about 3 "E"s, I think. Some of the mistakes weren’t too obvious.
I thought the Math Section was a joke.</p>

<p>ya it was like 3. math was really easy. and I was suprised how interesting the CR sections were.</p>

<p>Really… I almost slept reading the first section’s stuff. Section 3 was far easier to understand. Actually I agree, usually it’s really uninteresting.</p>

<p>Math - easy
Writing - easy, tripped me up a little bit here and there
Reading - easy</p>

<p>I messed up on the reading section 1, because I was barely awake and I didn’t understand a thing I was reading. They need to put the Math Section first, so people can get their minds working before they go on to the really boring reading section with a little bit more concentration. Other than that the test was easy.</p>

<p>what was the feline cat one. was it like the habit of feline cats… it was like choice e.</p>

<p>^ that was a hard one… Something about cats clawing trees.</p>

<p>The two Reading passages about the brain/mind were really boring.
Also this question:
If k is a constant such that x-2 and x+2 are factors of the polynomial 100x^2+k, What is the value of k.
A) -400
B) -25
C) -4
D) 25
E) 400</p>

<p>^ I didn’t get this one, can someone clarify?</p>

<p>-400 10char</p>

<p>How do you get it?</p>

<p>expand 100(x+2)(x-2)</p>

<p>multiply (x+2) and (x-2) to get (x^2-4), multiply that by 100 and k is -400</p>

<p>Thanks, I figured that out while waiting for a reply…</p>

<p>what about that vocab one where the choices were either eradicate, sever, or curtail? it seemed like any could work, but I went with curtail</p>

<p>since x-2 and x+2 are factors, you can factor 100x^2 +k. than you just plug in choices for k that would make x^2-4 , and that is 100x^2-400. then you factor, (10X-20)(10X+20), (10(x-2)(x+2))</p>

<p>How about this??</p>

<p>In the XY plane the two point A (-2,-5) and B (3,2) are each reflected about the line Y=X. What is the slope of the line to which A & B are reflected.</p>

<p>curtail 10char.</p>

<p>when points are reflected around y=x that is the inverse, so the new points are (-5,-2) and (2,3), then find the slope of those</p>

<p>slope is rise over run so (y2-y1)/(x2-x1) is (3–2)/(2–5) which is 5/7</p>