October 2010 ACT Math Thread

Test Preparation ACT Preparation
301

<p>Consolidated list:</p>

<p>Obtuse triangle: 6, 9, 13
x=0 and x=3/7
135th number: 8
Ratio of ball dropping: Geometric 2/3
Highest median: 90
tan-1(3/25)
Hour hand: 21 degrees
Garden: 6 by 24
Which cannot be X-value: 1
Equal volumes
Gallons of gas: 9.4
Buckets of paint: 14
Keisha’s weight: |w-p|<=5
Copy machines: slope, smaller slope, slope
Circle probability: 1/9
Amplitude and period: 3 and pi
Other point on circle: (8, -3)
Isosceles triangle: sqrt(200)
(x^a)(y^a) = (xy)^a
16(.2) = $3.20
Law of sines: 80 sin 110 / sin 24
0.0000376 = 376 * 10^-7
Infinitely many solutions: 9
Arc length: 8pi
log(x) + log(x-2) = log(x^2-2x)</p>

<p>That’s 25/60 questions.</p>

302

<p>what was the answer to the question which was somewhat like this, instead it was names</p>

<p>Which is implied from the following</p>

<p>All x are y</p>

<p>All y are z </p>

<p>All z are x</p>

303

<p>All z are y was the answer.</p>

304

<p>Thanks, I kinda got stuck on that one since all of them were true, I guess I ignored “implied” at that time.</p>

305

<p>Maybe you saw wrong Anonymous? Cuz no one here seems to have seen anything strange o.o</p>

306

<p>It was choice (E) that I thought was the typo.</p>

307

<p>What was the one where it showed the graph and asked the interval for x? Was it -∞ to ∞?</p>

308

<p>No it wasn’t. I remember there were 2 intervals that were increasing.</p>

309

<p>It was talking about x though not y.</p>

310

<p>yeah, intervals of x values in which y was increasing right? There were two of those I think.</p>

311

<p>about that question with the interval increasing i think it was a polynomial. i remember putting something like increasing from a to b, and d to +infinity anyone confirm?</p>

312

<p>@ Peternator : Thats what I got.</p>

313

<p>Do you guys think Math is getting harder and harder?</p>

314

<p>LOL!
That made me laugh a bit, why the heck would a question ask from where are the x values are increasing, that’s just silly.</p>

<p>ALSO, I have 2 more answers to add:
there was one question that gave a/b = something/11 and a+b = something</p>

<p>If someone remembers what a+b is I could remember the answer.</p>

<p>Also,
I remember getting 7/3 for an answer.</p>

315

<p>Wasn’t there an answer that was 6/77?</p>

<p>a+b = 54
a/b = 7/11</p>

<p>a=21
b=33</p>

316

<p>^Yes i agree.</p>

317

<p>^Yup, that was the answer.</p>

318

<p>Anyone remember the 7/3 answer??</p>

<p>Wait, I remember another one. There was a function for bunnies question and it asked how many bunnies there would be after x years, I forget the number of years. But I just plugged it in and I remember getting like 250 bunnies? I dont remember the exact answer</p>

319

<p>^Yes there was an answer that was 7/3. </p>

<p>In fact there were two numbers for that answer. It was x=0 and x=7/3.</p>

320

<p>Oh.I remember now.</p>

<p>Yeah, it was x=0 and x=7/3</p>

<p>Haha, I remember I didnt even solve that problem. I just used Vietas formula and knew that the sum of the two roots had to equal the coefficient of the x term and so 0 + b/a was the answer. and b/a simplified to 7/3</p>