<p>No, it means that a can be zero. Assume A=0, now go through your “proof” of the fallacy. If a=0, then you can’t go from
sqrt AB = sqrt A * sqrt B
to
sqrt B = (A+B)/2*sqrt A
because you’re dividing both sides by zero.</p>
<p>@James the question was which of these CAN form a triangle :/</p>
<p>but B may bot be ZERO
which means you are not dividing both side by ZERO</p>
<p>If A=0
sqrt B=B/0</p>
<p>I have seen many practice tests, and only 1 test had a curve for math where -1 was 800. That math section seemed much harder than June. June math was tricky, but this is what I think the curve will be.
<a href=“http://www.erikthered.com/tutor/SAT-Released-Test-Curves.pdf[/url]”>http://www.erikthered.com/tutor/SAT-Released-Test-Curves.pdf</a>
65% sure it will be a yellow curve (Just follow link) and 35% sure it will be green.
-1 is almost always 770.</p>
<p>@whybrick You divided both sides by sqrt(A). If you assume A=0, that step is incorrect.</p>
<p>you don’t assume A=0 while you go from (a+b)/2=sqrt ab to sqrt B=(a+b)/2*sqrt A
assuming at the beginning of inverse of multiplication or at the end of it?</p>
<p>I did not assume at the beginning.
I just prove A can’t be ZERO after</p>
<p>If A=0, you can’t divide both sides with ZERO as you said. then inverse of multiplication cannot be done because A=0
this way, A can’t be ZERO as well</p>
<p>Yes, you do. If I say 2x=2x^2, I have to assume that x=0 before I can divide both sides by x. That’s a fact of division: if the quantity that you’re dividing by is 0, you can’t divide by it.</p>
<p>Yes,
that means X can’t be ZERO…!!!
if 2X=2X^2 works. there should be a condition saying x is not 0</p>
<p>A=AB
answer to this simple question is B=1</p>
<p>if A=0, you can’t go from A/A=AB/A as you said I can’t divide by ZERO both sides.</p>
<p>what is the answer you think?</p>
<p>answer should be B=1 with a condition “A is not 0”</p>
<p>@whybrick</p>
<p>what are you arguing</p>
<p>What was the problem with airline company asking for??</p>
<p>How I did the a+b/2=sqrt(ab) question:</p>
<p>Square both sides: (a^2+b^2+2ab)/4 = ab
Multiply both sides by 4: a^2+b^2+2ab = 4ab
Subtract 4ab from both sides: a^2+b^2-2ab = 0
Factor: (a-b)(a-b) = 0</p>
<p>Which implies that a can be negative (as long as b is negative) or positive (as long as b is positive) or zero (as long as b is zero).</p>
<p>And the question was “could” be true. Which means the a and b wqual zero case would be sufficient to choose that answer choice. </p>
<p>The square root of a number is always plus or minus. sqrt(4) = +/- 2, for instance. I have never heard of square root implying absolute value…though I suppose that would be possible. But if that is the case, then I think the question was unfair, as it is based on implication and not on math :/</p>
<p>@wogud220</p>
<p>What expenditure of the airline company caused the greatest discrepancy in price between airlines A and B.
There was Crew A: 700 B: 386
Very sure is it was crew.</p>
<p>The airline company question was asking for which category accounted for the greatest difference in the price between A and B. The answer was the crew.</p>
<p>@flying 223,
go look up what the sqrt sign means. Every single website indicated that sqrt(x^2) = |x|.</p>
<p>does anyone remember how they got 320 for the Vitamin C question…I’m trying to remember if I got it right. I remember doing systems of equations and getting -3x = -270 and then x=90, but idk if i got y=230.</p>
<p>anyone remember what answer choice the airline company question was? B?</p>
<p>@Lefty I think the answer was A, but I’m not entirely sure…</p>
<p>@extractum11, yes I remember being A</p>
<p>how is the curve looking?
any consensus with the sqrt ab?</p>
<p>Agreed with everyone except for a cylinder. I didn’t have any questions about puppies or salads or chefs though, experimental section?</p>