October 2009 SAT Math

<p>about the x<y ans r<s…</p>

<p>are we sure the question didn’t ask you to consider just positive numbers?</p>

<p>1800? i dont even remember what i put. but im pretty sure i put C or D. which answer choice was 1800?</p>

<p>GUYS,</p>

<p>no one seems to be getting this one right:</p>

<p>how many values for (x+6)^2 = 0???</p>

<p>it is NONE!!! because you have to distribute…:</p>

<p>(x+6)(x+6)=x^2+6x+6x+12= x^2+12x+12 = 0</p>

<p>What interger can you put to get zero…NONE!</p>

<p>I think the 1800 question wasn’t multiple choice. You had to fill it in yourself.</p>

<p>Wait, Tuftsbound, you could plug in -6.
(x+6)^2 = 0
(-6+6)^2 = 0
(0)^2 = 0</p>

<p>oh thanks :slight_smile: i guess i might have gotten it wrong then,thats what happens when u think questions are easy ■■■</p>

<p>Oh and if you distribute it, it would be
x^2 + 12x + 36 = 0.
36, not 12.</p>

<p>to tuftsbond:the answer was 1 ie -6 check your expansion because 6*6 isnt 12. its 36 so the equation has to x^2+12x+36</p>

<p>(x+6)(x+6) = x^2+6x+6x+36 = x^2+12x+36… x^2+12x = -36, x*(x+12) = -36, x=-6. you could also use -12±sqrt(144-144) / 2 which gives you -6 with multiplicity 2. </p>

<p>the better way of course was to just look at it and see -6 works :P</p>

<p>tuftsbound you distributed wrong.</p>

<p>I’m an idiot! I put two for that x+6 equation. I was going too quickly and once I saw the power i immediately marked two…</p>

<p>Is it still possible to ge t800 if I miss one question?</p>

<p>What is the x<y, r<s question’s answer ?</p>

<p>cermi it is! each wrong answer is -1/4 and between 56 raw score to 54 raw score,one is able to get an 800.but im not ■■■ about 10 of them wrong ie like -2.5 so possibly a 650-780 since most of them were the grid in section and its a non-penalized section</p>

<p>Only I was right. II and III were wrong.</p>

<p>A.) I only.</p>

<p>Thanks for info. I wouldnt mind 780 or 790 but 800 just looks better. And know when I found out I wasnt fully paying attention I’m afraid I might’ve done more mistakes.</p>

<p>just b optimistic mehn,besides im just looking to get into the college i want. Aiming for 1350 to 1580 hopefully. aim 4 what u want,UR NOT PENALIZED FOR BEING OPTIMISTIC lol</p>

<p>The scatter plot question, what was the first reading on the x-axis? Anyone still remember??</p>

<p>Scatter-plot question was y=5x+20 I believe.</p>

<p>hey guys did any of you have that questions where they asked what would happen if you were to double the values of the variables?</p>

<p>Like it said what would happen to r if you doubled the values of s and t or something (and then they had one of them multiplied by a square).</p>