did anyone else do this?

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1

<p>I was an idiot and tried to solve the matric problem by plugging in numbers and then solving the problem on my graphing calculator.</p>

<p>It tookk up so much time! And eventually when I finally figured out the right way to solve it, I didn't even need to use my calculator.</p>

<p>Did anyone else mess up like I did?</p>

2

<p>Last time I looked at matrices was in 8th grade, and it was a quick short assignment that was extra credit for our 1st test. </p>

<p>I didn’t make that mistake, I just did it the normal way I guess. I was some # after #50 right? I thought it was supposed to be extremely hard, unless there’s some trick to matrices.</p>

3

<p>Was this the determinant one? All you had to do was 1st term x 3rd term - 2nd term x 4th term. Or is this a different one?</p>

4

<p>there are so many shortcuts on the act..like the ones you think you have to graph, you dont..it’s just logic</p>

5

<p>Oh gosh I was about to do that.. then some kid kicked his chair and it made a really loud noise.. so I woke up from my little daze and thought about it and im like.. OH GOD the answer is just logical.. no numbers necessary.</p>

6

<p>all u had to do was follow the example tht they gave..</p>

7

<p>yeah lol they showed you how to find the determinant of a 2x2 matrix.</p>

8

<p>i know.</p>

<p>i feel stupid</p>

9

<p>(top left)(bottom right) - (top right)(bottom left) = determinate</p>

10

<p>i get it thanks</p>

11

<p>determinites are pretty easily forgotten things… i really have never understood why we use matrices.. oh well</p>

12

<p>u can actually use matrices to easily solve a system of equations with 3 variables.</p>

13

<p>I couldn’t remember how to do those and then I looked at it again and realized how easy it was.</p>

14

<p>YEAH matrices totally saved my life a bunch of times lol. i even use them for 2x2 equations!! >:P</p>

15

<p>oh my gosh! are you serious?!? that was the EASIEST problem ever.
they gave you an exact example. you just had to copy it.</p>

16

<p>^i think they realized XD</p>

17

<p>Wow.</p>

<p>Thanks for making me feel good about myself.</p>

18

<p>“oh my gosh! are you serious?!? that was the EASIEST problem ever.
they gave you an exact example. you just had to copy it.”</p>

<p>not everyone understands matrices (or didn’t see that part of the problem maybe because they were moving as fast as they could on the math section).. don’t give him such a hard time</p>