January 2010 Math thread

<p>@amaaayzing. </p>

<p>anywhere from 730-760 depending on the curve. The last times I took it, I had -1 for -30 and -2 for -50. (How I love harsh curves).</p>

<p>Oooh, okay thanks :)</p>

<p>What! Weird, people at my school had an experimental writing section and they also had that math question though…</p>

<p>What was the exact question for the PQRS one?</p>

<p>Well the reason I’m concerned is because I took the SAT back in October… only got a 730 with -2 wrong MC. </p>

<p>Even a more brutal curve, haha</p>

<p>I did the SAT Oct 09…-2 for 750…</p>

<p>Is there a compiled list still going on??</p>

<p>@hopter: Four points, P, Q, R, and S, lie on a line in that order. Q is the midpoint of PR; R is the midpoint of QS. PS is 18 units long. Point X is between Q and R such that QX = 4. What is the length of XS?</p>

<p>

</p>

<p>Oh wow, really? Thank god.</p>

<p>^</p>

<p>xs = 8</p>

<p>does anybody remember the question about the y-coordinate of Point P as having the same slope as a line? and then you had to find out what coordinate must be in the line then? </p>

<p>i think i got something like (-1,0) but i wasn’t sure</p>

<p>@IAmCool: Are you thinking of the one where you had to find one possible x-coordinate? The line’s equation was y = (1/2)x - 1 and you had to find an x-coordinate such that the corresponding y-coordinate was positive and less than 1/2. I picked 1/4 for y, then solved for x (and got 5/2).</p>

<p>what were the exact numbers for the students in both clubs question?</p>

<p>15 in one club and 12 in the other
and 11 are only in ONE club.</p>

<p>@Neytiri: Haha I did the same exact thing! I’m sure there were a range of answers to that question though.</p>

<p>@Neytiri I don’t think that (5/2,1/4) was an answer though
the answers were something like
(1,1)
(1,0)
(1/2,-1/2)
(-1,1)</p>

<p>probably not the exact answers but 1,0,and 1/2 were the only available choices, i don’t think we’re talking about the same question?</p>

<p>IAmCool, I think I vaguely remember something like that… but I can’t recall what the question was asking XD</p>

<p>@IAmCool: Oh sorry, I guess not. The one I was talking about was a grid-in.</p>

<p>(sorry if someone already mentioned this one)
but what was with that knitting question?! please tell me that was in the experimental section.</p>

<p>I’m pretty sure the question was asking something like a line crosses the y axis at point P. If the slope is the same as the y-coordinate of point p, what point must be in the line? </p>

<p>what i did was i did y=px+p because p=the y intercept and the (-1,0) was the only one that fit if you inserted it in for all values</p>

<p>i might be wrong though because i honestly had no idea what i was doing for that question</p>