Official November 4 SAT Math Thread

<p>oh okok i got those 4x and 4 questions right.</p>

<p>i'm thinking i got all math problems right, since all the ones i looked thru on this thread were right</p>

<p>but for the second one i asked, it was a problem second to the last from the last section of math.. darn
one above where there was a right triangle inscribed in a circle, asking for the area
did anyone have that? i cant quite rmember what the question actually asked for</p>

<p>Yeah the answer 4, i remember taht one, it turned out to be 16x / 4x which equals 4. </p>

<p>For the directly proportional to y question, what was the answeR?</p>

<p>what'd you guys get for the question where they asked x number of people's average age was 16,
then one person was replaced by a person 12 years older, making the avg age 18
it was asking for the number of people i believe</p>

<p>gosh this forum is making me nervous ..!</p>

<p>azngamer54: 4x.</p>

<p>papercuts: that problem i solved using solve() on my ti-89 ti. i didn't even give it a chance with my own brain, and i'd still rather not ponder it. i got n = 6.</p>

<p>to you two:
did both of you have the 3 overlapping circles problem and did you have a math experimental?</p>

<p>oh ok good i got 6 too but i like plugged in damn #s haha</p>

<p>i had 3 overlapping circles problem and no i didnt have math experimental
and i'm glad it was 10pi, whew.</p>

<p>i did not have math experimental, but i did have taht 3 overlapping circle one.</p>

<p>I put that answer as 10pi, (i don;t remember how i solved it). I think the posts in previous pages said this was the answer?</p>

<p>ahhhhhhhhhhhhhhhhhhhhhhhhhhhhh.</p>

<p>i spent 2 minutes on that problem, and then realized there probably was no real way to solve it, and that i was just supposed to rely on the figure's looking like the answer was half the circumference.</p>

<p>****age, and while i was trying to save time, i forgot to halve c for 10pi.</p>

<p>why do i always have one problem where i do something stupid like this, jesus christ.</p>

<p>effin' ****.</p>

<p>fickety fack.</p>

<p>fudge.</p>

<p>pew pew pew pew pammit.</p>

<p>edit: i'll be fine. and while i subconciously doubt i'll get it,
i would be perfectly happy with 780.</p>

<p>Well at least you didn't do something stupid like me. I read the "Directly proportional" question wrong, and read it as "indirectly proportional". I have no clue why. I was trying to save time, and my mind just read it as indirectly, now i wont be able to fall asleep. I hate missing stupid stuff. :[</p>

<p>the x2-8x+k
k=16
bc u need only one answer</p>

<p>(x-4)(x-4)</p>

<p>did anyone get this question?
R^2XY=200 While RX=40 What is the value for R. or something like that.</p>

<p>Thank You Mountain Dew. That is teh exact question I had, people are saying that it wasn't asking for the value of R but something else wierd.. Did you have this question as a grid-in. I seriously can't remeber.</p>

<p>The 3 circles was 10pi, if you connect the three points of intersection you get an equilateral triangle (angles = 60deg) since 60 deg is 1/6 of a complete circle and you have three equivalent arcs you have half of the circumference.</p>

<p>The question involving x^2-8x+k was 16, simply complete the square (when a linear function such as (x-4) is squared it still only has one answer).</p>

<p>The question involving the average age of the number of people was 6, since the age increase was 12 and the average increase was 2, you need 6 people.</p>

<p>The question involving 35<5x+1<300 should be (300-40)/10*2+1 or 53, since there's two numbers that fit the formula in every multiple of ten, but you exclude the first one because it starts off half-way through 30-40.</p>

<p>md, ach44.</p>

<p>i have seen that exact question twice, on the last two sats.
it asked for what a letter (r? t?) could NOT be, when
all the letters must be integer values.
the choices were like 5, 10, 20, 30, 40.</p>

<p>the answer was 30 because it doesn't divide evenly into 200 nor 40.</p>

<p>That section must have been experimental. Why else would they keep giving the same question??</p>

<p>one question about</p>

<p>N,R,W,S...</p>

<p>what is the prob of getting N,R,W,S in that order?</p>

<p>1/24? did anyone get the same answer?</p>

<p>yup 1/24</p>

<p>also do you remember that question with the three light bulbs ( red blue green)
how many different ways can it be rearranged. it's 6 right</p>

<p>yeah it was six...i SUCK at prob....i got that one WRONG...</p>

<p>so gay figured it out like a minute after i finished it.. sigh..such a EASY question too..</p>

<p>anyway..</p>

<p>one answer being x+y>8....ring a bell?</p>

<p>The nice thing about most of the SAT I probability problems is that they usually are easily solved through factorials. If you have n distinct elements, the number of distinct possible arrangements is always n! where n!=(n)(n-1)(n-2)...(n-(n-1)). </p>

<p>So for the N S R W one it would be one possibility out of the total (4! or 24) so 1/24.</p>

<p>For the lightbulbs one it is 6, since you have three distinct elements (or colors of lightbulbs) then it's 3! = 3<em>2</em>1 = 6.</p>

<p>And yes, gaia87, x+y>8 was the correct answers, simply reduce the linear inequalities to x<4 and y<4 and add them together.</p>

<p>Does anyone remember the answer to the one about the Ski team and the Outdoors Club??</p>