ACT Sept 2012 MATH

Test Preparation ACT Preparation
1

<p>I thought the last page was hard as hell. Guessed on 5</p>

2

<p>Yeah there were like 3-4 that were really hard… Did nayone figure out the logarthim one? (log (x+a) + log(3x) = log(3x^2 +12x)</p>

3

<p>what was the answer to the one with the pattern of squares and circles</p>

4

<p>Thought it was super easy, but I’m naturally good at math. If I missed a question, it was from a dumb mistake. But, I finished 5 minutes early and was able to go over most of my answers (and fixed 1 or 2 careless errors). I got an 800 on the SAT Math II subject test though so don’t assume that it was easy just because I thought it was haha. Science though… Oh my gosh</p>

5

<p>Im pretty sure it was something along the lines of </p>

<p>5(x + 14 + 12) = 200</p>

6

<p>Log one was a = -4 if I remember correctly.</p>

7

<p>I’ll be home on about an hour & can help u guys out with any questions u have then</p>

8

<p>log(x+a) + log(3x) = log((x+a)(3x)) = log(3x^2 + 3ax) = log(3x^2 - 12x)</p>

<p>-12x = 3ax</p>

<p>-4 = a</p>

<p>What was the answer to m+n = m*n question? And the intersecting circles + angles question that asked what one of the angles was. E was ‘unable to be determined’, to give you a memory cue.</p>

9

<p>does anyone remember what the last question on the math test was?..</p>

10

<p>it was either 30 or not enough info for the circle/square/triangle picture</p>

11

<p>@sanguinee i didnt get it but my friend told me it was -4?</p>

12

<p>@redsummer12</p>

<p>I know the graph was this…</p>

<p>

<a href=“http://i.imgur.com/HmQPs.jpg[/IMG]”>http://i.imgur.com/HmQPs.jpg

</a></p>

<p>I completely guess on this one because I was out of time.
I think i put </p>

<p>abs(x-a)^2</p>

13

<p>Wasnt the angle one 60? It asked for the top part of the whole triangle not the split in half part right?</p>

14

<p>I put not enough info for the circle/square/triangle picture. Someone else said it was 30. It might be either one of those, not sure which.</p>

<p>m+n = m<em>n could’ve been infinity, 2, or 0 depending on the constraints. I was just stupid and forgot to pay attention to the constraints. I think it said they had to be positive integers, which would leave just 2+2 = 2</em>2. I didn’t realize it said positive, though, so I also had 0+0 = 0*0 and therefore I put possible pairs = ‘2’ as my answer.</p>

15

<p>And brownguy i think it was like |x^2-a^2| cus when x was A then Y was 0</p>

16

<p>@brownguy! i had no idea on that one. i’m hoping to have missed 5 on the math …</p>

17

<p>Wait, so for the m+n=mn, the answer is 0 because m and n had to be different right?</p>

18

<p>@garciac </p>

<p>Im pretty it was half the triangle and the answer was 30. The placement of the side letter caused me to think it was referring to the full triangle too.</p>

19

<p>@ Brownguy
No, it was the other answer with abs</p>

<p>@HEVYDEVY
No, because it was distinct pairs, not distinct numbers (I think)</p>

20

<p>@hevydevy:</p>

<p>Yes, I think so, I was just stupid and neglected to see that. I thought it meant that you can’t reverse the M and N and call it a new pairing.</p>

<p>Although if they didn’t have to be integers, it is infinite, but I think it said they had to be integers.</p>