<p>OK last one:</p>
<p>Did anyone get the one with like:</p>
<p>2x+y= 550 ml
x+ 2y= 300 ml
It was grid-in.... what did you get?</p>
<p>it was asking for x+y</p>
<p>system of equations</p>
<p>something over 300, forgot exactly what</p>
<p>Yeah, I know y was 90...and I think I got either 320 or 330...can anyone remember the exact values?</p>
<p>Come on guys lol :P</p>
<p>Bump bump bump :P</p>
<p>If Y is 90 it's 320</p>
<p>The answer is 283.33. It's not "If y is this, then that. . ." There is a unique solution for both x and y here.</p>
<p>Knavish, those are approximate values, those are not the real values, I can't remember the exact ones. It was like that though.</p>
<p>How is it 283.33?</p>
<p>X=230
Y=90
2(230)+1(90)=550
1(230)+2(90)=410 -edit (I think the actual problem had 410 for the second value, not 300... 320 has been referenced as the answer in a few other threads)
Thus 1(230)+1(90)=320</p>
<p>2x+y= 550 ml
x+ 2y= 300 ml</p>
<ol>
<li>manipulate equation 1: y=550-2x</li>
<li>Plug into equation 2: x+2(550-2x)=300</li>
<li>x+1100-4x=300</li>
<li>x=266.66</li>
<li>Plug x into step 1 to find y...y=16.666</li>
<li>Add x and y to get 283.33</li>
</ol>
<p>That's how you do it. But i remember getting an integer answer. Are you sure the 300 is right? Also Piterbizon, 230 and 90 doesn't work for the second equation. You end up with like 410.</p>
<p>410*</p>
<p>I forget what the problem was, but I'm almost positive it wasn't 300 for the second, and almost positive there was no answer choice as 288.33.</p>
<p>Edit: Oh yeah, it was open response. Still, pretty sure it was 410 on the 2nd equation.</p>
<p>Yes, it was 410...I remember now. I remember sitting down and plugging something wrong in my calculator, getting an noninteger and doing it over. Basically, yeah, the second equation is 410 and x is 230. making y=90 and x+y=320.</p>
<p>Yeah I also had to manipulate the problem on that one, i got the same answer as yall</p>
<p>Weren't you able to just add it all up and divide by 3?</p>
<p>yeah mike...that's actually a much easier way. i didn't think about that. i thought about cancelling out the x's or y's by multiplying one equation by -2...but you're way is actually the easiest way.</p>
<p>I multiplied by 2, just because thats what I've been doing for the past few years</p>
<p>It was definitely either 320 or 330 lol.</p>