November SAT Math Discussion!

<p>I think it was no pts. shared…</p>

<p>Anybody have the math question which i believe had no answer? it involved set a being divisible by 3, set b being the factors of 36. Which is not in A but in B and the answer was not there</p>

<p>so does anyone know the max amount of questions we can miss and still make a 2000+?</p>

<p>FullMetalx it all depends on the questions you skipped and how many you actually got wrong. 2000, 1900, 1800 whatever are all numbers in the scaled scores. </p>

<p>[The</a> SAT Scoring Scale](<a href=“http://www.testmasters.net/SatAbout/Scoring-Scale]The”>The SAT Scoring Scale)</p>

<p>If you’re curious that kind of explains it. You don’t miss any points for a question you skip, but you lose .25 for questions you actually get wrong. </p>

<p>So for arguments sake if you skipped 4 on section 2, writing, out of 35 questions, your raw score would actually be…</p>

<h1>answered (31) - # answered incorrectly x .25. So if you answered 8 incorrectly that would be 31-2, for a raw score of 29 on your first writing section.</h1>

<p>You’d have to average like a 670 for all three for a 2000, but how its distributed can vary.</p>

<p>skorpius7, how certain are you about the last problem being III only? that is what i put as well, but for II if both a and b are 0, then it works, that’s why i was a little up in the air…and what’s the chance for a -1 800 curve?</p>

<p>A had to be an integer greater than one, that was the kicker for that problem. I chose III only as well.</p>

<p>can anyone explain why the circle problem has no points?</p>

<p>I mean an integer greater than 0***</p>

<p>The circle problem where they were all overlapping and the radii were connected?</p>

<p>test type A (grand canyon and japanese teacher and television of slower programs, etc.)</p>

<p>I had three maths, and all I remembered are:
16 units of the height of whatever thing poured into the cylinder after 8 minutes, proportional to 2 units height or minute.
1001 for square root of n-1000 and everything has to be a integer
slope 3/4
995
13.5 in september or whatever month, shown in the chart
no points of intersection for two circles
162. y= h/(sqrt(x))
80 for perimeter of a rectangle comprised of seven identical squares in a line
4. A percent of B and B percent of A
27 arithmetic mean included with five or seven other numbers
45 degree with a 3-D shaped ball
15 degree with diagram of parallel lines, 2x=y=30
4 gallon. for a diagram of scattered points of a car or sth to run 100 miles
21 for seven points on a circle to be linked to one another
65% with the popcorn diagram thingy
100 square root of 5.<br>
E. difference between largest possible number formed by the same four digits
-3. j^2+k^2=25. j at minimum is -3
(x+1)/x</p>

<p>others aren’t in my minds right now…</p>

<p>estimate or calculate(during recheck) the radii of the two circles whose perimeters are 2 and 6.
r1+r2<5
which means if there’s only one intersecting point, the distance between two center will be less than five. Not to mention two intersection.
so only no intersection then.</p>

<p>I don’t think we’re talking about the same test lol, form B definitely didn’t have the question about the radii being less than 5?</p>

<p>the only one I wasn’t sure about was the tangent to the circle, and I just plugged in the formulas into my calculator and hit trace. I think I put a slope of 3/4 with the equation of the circle being (y+4)^2 + (X-3)^2=25. Was that right? I wasn’t absolutely sure between 3/4 and 3/5. Also if someone could explain how to come up with the tangent to a circle without just plugging in the formulas that’d be great</p>

<p>Fullmetal, the circle problem has no points shared because there is a distance of 5 between the centers. The diameters are 6 and 2, meaning a radius of 3 and 1. 3+1=4, which is the closest they must be to be touching anywhere.</p>

<p>Giatns4210, the answer to the problem was 3/4. The circle had a center of (3,-4), and also went through the origin, (0,0). Given that, radius to the origin would have a slope of (-4-0/3-0) = -4/3. A line tangent to the circle is perpendicular to it’s radius at the tangential point. Therefore the slope of the line is the negative reciprocal of -4/3, which is 3/4.</p>

<p>probably an easy question for you guys but what’d you get on the one that said</p>

<p>four digit number with unit digit of 3, what is the unit digit of n^7?</p>

<p>@AVGSTUDENT Its always a 7’s digit.</p>

<p>idk if you typed the question right but when I did it, it was always 7. can anyone confirm my answer?</p>

<p>That’s what I got too, but not really sure</p>

<p>Is this the math section from test B? I don’t recognize the question.</p>

<p>Yeah I had test B and this question: The last digit was 7 FOR SURE, I just did it on my ti 89 for couple of four digit numbers.</p>

<p>For the quadilateral WXYZ, I said X and Z were the same angles anyone concur?</p>

<p>For the question about the line tangent to the circle, I also got 3/4, but I did it in a totally different (a lot more complicated than it needed to be) way, so I’m sure that’s right.</p>

<p>The equation was (x-3)^2+(y+4)^2=25. Solving for y yields

I then differentiated y with respect to x.

Then I plugged in 0 for x, which yielded that the derivative of the circe at (0,0) was 3/4.</p>

<p>I feel like a bit of an idiot for using calculus on the sat, but hey, it got me the right answer :)</p>