<p>^got same answers for both of those xatuuatx, and good point on the non-gridding part. so confirmation then that it’s 40/3?</p>
<p>xatuuatx: i got 65 as well.</p>
<p>Any word on the triangle in a circle one where you had to find the angle? Was it 36?
36 sounds familiar. I think I got that.</p>
<p>Also I remember one about possible lines drawn across a polygon or something? It was like n(n-3)2??? I think I got 65
I got A…which was 60-something.</p>
<p>how did u double check the x/y?</p>
<p>it was either y/x or x/y.</p>
<p>guys, who got 5/12 and who got 2.4 for that one problem?</p>
<p>I’m very sorry to rehash, but going back to that last grid-in, I really believe it was WAY too open for misinterpretation.</p>
<p>Where was it clearly stated what f(4) and f(16) were meant to represent? The first thing I thought was that they were just f(a) and f(b), and I never second guessed myself. </p>
<p>It was still very possible to solve in this sense. All you had to do was write an equation with the information given [which was f(4)=12]</p>
<p>There were several equations possible, including:</p>
<p>f(x) = 3x
f(x) = 2x+4
f(x) = x+8</p>
<p>The one that I chose because it worked was (1/4)(x) + 11–> (1/4)(4)+11 = 12.</p>
<p>Then I plugged in 16, and (1/4)(16)+11 = 15, which is what i gridded in.</p>
<p>Also, it worked perfectly, because if I thought a = 4, and b = 16, then ab = 64. Which means that I would have to plug 64 back into my equation to check, which I did</p>
<p>(1/4)(64) + 11 = 15+12 = 27
Now notice that f(a)=12,and f(b) which i found = 15. This satisfies the original conditions set, which were f(a) + f(b) = f(ab), so why is this not possible?</p>
<p>Once again, there was no specification, so I believe that the question was honestly incomplete and required speculation…Please feel free to enlighten me.</p>
<p>Well if you think about the logic of the question…the 40/3 one:
the bottom triangle is bigger…but only by a little bit. if the small one was 10 away from the line, then 40/3 comes out to be 13.33…which could be about right.
And if it was true about hte squaring thing…then it would be that 3/4 = side smaller^2/side bigger^2… meaning (square root of 3)/2–and that would give you an answer less than ten.</p>
<p>Haha I no longer think 40/3 is right even though I put that. 11.54 is what it should be maybe?</p>
<p>Because ratio of the areas does not equal one side of the other. It’s side squared over the other side squared. </p>
<p>[Area</a> and Similar triangles. How to find the ratio of areas from the similarity ratio. All you have to do is…](<a href=“File Not Found [404 Error]”>Area and Similar triangles. How to find the ratio of areas from the similarity ratio. All you have to do is...)</p>
<p>Is there a penalty if you get the grid-in wrong? Or is it only the MC?</p>
<p>I’m still confused about the f(ab)=f(a) + f(b) = 12</p>
<p>This is what I did and I want to know why it’s wrong.</p>
<p>So it gave f(4) so I made that f(ab)=f(4) + f(1)= 12
Because 4 times 1 is 4 obviously. So then I thought that because it was a function there had to be some equation that you plug in to get a number.
So I did f(a)=2a+1
That way 2(4) +1 and 2(1)+1=9+3=12</p>
<p>So then for the final answer I started with f(16)= f(4) + f(4). And since I had already solved for f(4) in the first part, I got 9+9=18.</p>
<p>Boddah: i put 11.5 for that. T__T
i hope it’s magically right?!</p>
<p>how did you guys do the ice cream and soda question?</p>
<p>^ because there were several equations that could be written from that,
you needed to follow the given DEFINITION!</p>
<p>thus f(ab) = f(a) + f(b)</p>
<p>think of it like one of those weird circle or star or box questions…
you wouldn’t try to figure out that function, would you?</p>
<p>Also, i’m pretty certain that it’s 40/3</p>
<p>k…
Area of triangle = .5bh</p>
<p>3/4 = ratio of areas
3/4 = .5b1h1/.5b2h2
3/4 = h1/h2 (since the bases are the same)</p>
<p>EDIT: Also, just fyi I have NEVER seen an SAT grid in where you could only fit the decimal in and not the fractional equivalent when it’s like this.</p>
<p>Yes but only one equation worked. And I’m pretty sure that’s the only answer you could have gotten if you interpreted it my way.</p>
<p>If you used a coefficient for x that was> 1/4, the value of f(64) was > than that of f(4)+f(16). If you used one that was < 1/4, the value of f(64) was < than the sum of f(4) and f(16).</p>
<p>For the last grid-in, I got 24.
My friends agreed with me when we discussed it.
…
f(4) = 12
f(16) = f(4*4) = f(4) + f(4) = 12 +12 = 24.</p>
<p>dre: it’s only for mc.</p>
<p>wharton: i used two variables and created two equations (i don’t remember what the equations were) and combined them.</p>
<p>i think i got $3.50?</p>
<p>someone needs to confirm the 40/3 problem, it’s driving me bonkers :/</p>
<p>The answer was like 3.50. You could have set up a system of equations. And then multiplied one equation by 3 and the other by 2 to cancel out a variable then just solve.</p>
<p>I just set up my equation and put it into a matrix and did the [A]^-1** trick that I love</p>
<p>Summary so far-feel free to add
Weird function, f(a)<3 = 0<a<7
f(ab)=f(a)+f(b) = 24
Math and Science Students = 90
Tanks A and B = 160
Two Triangles, area ratio of 3/4 = 40/3
Upside down parabola = A (-3 only)
Ice cream and soda = 3.50
Circle, Tangent line, radius of 4 = 4 radical 3
Least prime divisor = 5
Volume of rectangular prism = 144
Circle with triangle in it-find the angle = 36
n(n-3)/2 polygon = 65
P and x pie chart = 40<x<50 I think</p>
<p>EDIT:fixed 12 to 24</p>
<p>i got 3.50 from guess and check</p>