<p>damn thanks mike. i thought the x was only the height of the triangle. didnt look at the problem carefully. thats 1 wrong, im hoping thats still a 800.</p>
<p>does anyone remember the other answer choices to the one with the trapezoid and the two triangles of sides 8 and 6? I know the correct answer is 50, but what were the others?</p>
<p>Honestly, the moment I saw 50, I filled in and moved on.</p>
<p>^Same here.</p>
<p>But I am pretty sure I remember 100 was an answer. I dunno about the rest, though.</p>
<p>i realized the sides were 10 and 10 but I think I might have just multiplied 10x10 to get 100 and forgot to divide by 2. Was 100 an answer choice?</p>
<p>"indiejimmy, 3 doesn't work because when you plug in a=1 b=1 and c=3, you get
1/3 + 1/6 + 3/18 = 2/3." </p>
<p>my bad, i meant to say:</p>
<p>a/3 + b/2 + c/18 = 1
1/3 + 1/2 + 3/18 = 1, so abc=3?</p>
<p>6a+3b+c=18</p>
<p>i dont understand why u would do 6+3+1 and divide 18 by it.
if you were really to solve it individually
it wouldn't work because there are multiple answers.
and u can easily do guesswork for it..</p>
<p>*** isnt abc = 6</p>
<p>bob, yes it is</p>
<p>XAltruistX, can you explain your steps? These are the problems I see:
How can you go from 6a+3b+c=18 to 18/10=1.8 and then deduce that a=b=c=1.8? Also, how is (6<em>1.8)(3</em>1.8)1.8=abc? It looks like 6a * 3b * c to me.</p>
<p>Elaborate more and I'll try to figure out what the problem is.</p>
<p>he or she assumed a=b=c=1.8... but that wouldn't work with the original equation
since 6a+3b+c IS NOT 18</p>
<p>indiejimmy that still doesn't work because the question was
a/3 + b/6 + c/18 = 1
not a/3 + b/2 + c/18 = 1</p>
<p>It's 1/3 + 2/6 + 6/18 = 1, right? So 1 * 2 * 6 = 12? That's what I put. I wasnt sure if product meant multiply or add, LOL.</p>
<p>did the abc ones have to be different variables for a b and c? i got 9
what is the reasoning behind the xy=x+y one?</p>
<p>What? I didn't assume that a,b, and c were equal. I assumed that they were multiples of 1.8</p>
<p>Actualliy, it worked.</p>
<p>((6<em>1.8)/18)+((3</em>1.8)/18)+(1.8/18)=1</p>
<p>I taunted it. I knew y > 2, so I did the following.</p>
<p>y > 2
xy > 2x, xy=x+y
By transitive property, 2x > x+y</p>
<p>From there on you just plugged in the answers until you got which one it was.</p>
<p>xy=x+y? I hated that one. In the end, I let x=1.5 and y=3, and that worked, so I chose 1<x<2(D).</p>
<p>leetx, you move y to one side by:</p>
<p>xy = x + y
xy - y = x
y (x-1) = x
y = x / (x-1)</p>
<p>then you plug in random x (the question said x >2) and you see that 2.0000001 / (2.0000001 - 1) = 1.999999 and that 50000 / (50000-1) = 1.00001.</p>
<p>So answer is 1<x<2. This is how I did it, there were probably other ways also.</p>
<p>i think i confused the wording for one of the questions... when x is added to nine less than twice the number you get 180...it was an open ended i think..what did everyone do for the equation?</p>
<p>Woah .. you guys made the ABC question really complicated. Did anyone else get 12 or no?</p>