<p>aquamarinee is comparing them to the official collegeboard tests.</p>
<p>Kaplan is comparable I thought. Barron's were like 1034902x harder. I wanted to shoot myself after taking the Barron's practice tests. Do you think the curve will be normal this time, namely 44 or 45 = 800?</p>
<p>Probably Sparknotes.
I just skimmed PR once and they were similar too.
Barron's is not comparable.
Don't know anything about Kaplan.</p>
<p>I thought it was harder, since last night I studied a ton of limits, summations, trig, inscribed geometry and contrapositive logic stuff, but there was barely any on the test. Right now it seems okay, but I panicked a lot, so I don't know...</p>
<p>i'm hoping for 43 = 800</p>
<p>what was the answer to: what is the domain of f(x): (x-5)/(x^2-5x)
I'm pretty sure that I wrote the equation right...</p>
<p>Anyways, I picked all real numbers except 5; I plugged the eq into my graphing calculator but there were actual y values for 5 and 0... and I thought that it was weird since there is a hole in x=5</p>
<p>Also, how do you do the xy = 20, x+y = 10 question?</p>
<p>you were supposed tof actor the bottom, so the whole thing became 1/x</p>
<p>so the answer's everything except one</p>
<p>i had a question just like that before that i got wrong, so i'm pretty sure</p>
<p>I panicked during the last few minutes. That always happens... I must work too slow or something. 43 = 800 is like HEAVEN. That's the sparknotes curve: <a href="http://www.sparknotes.com/testprep/books/sat2/math2c/chapter2section4.rhtml%5B/url%5D">http://www.sparknotes.com/testprep/books/sat2/math2c/chapter2section4.rhtml</a></p>
<p>I'd love to have that curve. It would mean that I didn't fail the test. Or so I think.</p>
<p>The domain was all real numbers except 0 and 5 since you can factor the bottom into x(x-5)</p>
<p>It couldn't be 0 or 5, because that would result in an undefined denominator.</p>
<p>For the x + y = 10, xy=20 problem, you can solve by substitution. If y=20/x, then x+20/x=10. After getting that formula, I put it into my calculator and solved to find x. (I was running out of time, so I couldn't do it manually).</p>
<p>there's no value for 0. it's undefined.</p>
<p>"what was the answer to: what is the domain of f(x): (x-5)/(x^2-5x)"</p>
<p>it was all except -5 and 0</p>
<p>maributt: but there is a gap at x = 5 though...
Although the calculator indicates a number for y when you plug in x=5</p>
<p>I did the same thing, blondie. What final answer did you get? I don't remember anymore.</p>
<p>i meant 0 and 5, sorry</p>
<p>the calculator doesn't indicate a number at x = 5...
it's a discontinuity there. x = 0 is the asymptote. x = 5 is the spot discontinuity.</p>
<p>argh, I'm so stupid. I know for sure that I plugged in the wrong equation
=(</p>
<p>and no, the answer is everything EXCEPT 5 or 0.</p>
<p>no, but you were supposed to cancel the (x-5) on the top and the bottom</p>
<p>I don't really remember... 7.something... was it 7.44? does that sound right?</p>