<p>a = 1, right?</p>
<p>sie note: im porting on this thread way too much, arent i?</p>
<p>any curve predictions?</p>
<p>the curve is probably going to be average-harsh because overall it was pretty easy</p>
<p>what is the oil/gasoline one? i think it was multiple choice right?</p>
<p>For the ratio one</p>
<p>It said the ratio had to be anywhere from 1:8 to 1:5 I believe</p>
<p>So </p>
<p>1 x 1
- < - < -
8 40 5</p>
<p>So anything between 5 and 8 is an acceptable answer.</p>
<p>And the parabola, I just knew that a parabola with a=1 looks a lot less steep, and it said it was drawn to scale. So i said >1</p>
<p>@SamLHS is that inclusive or exclusive? I remember being confused on that one at first because I thought the ratio was oil:the whole mixture, not oil:gasoline. But I put 6 so I hope that’s right.</p>
<p>I believe it was oil to gasoline
I put 6</p>
<p>I put 6 also</p>
<p>Yay! I always get so frazzled when I’m checking my work and realize that I made a mistake like misreading the question. I agree with thesats1234567; I’m not expecting the curve to be very generous on this one.</p>
<p>I heard that curves for January test are the most favorable because that is the first one that only juniors and below take, despite it being easy</p>
<p>@agreatperhaps</p>
<p>Don’t cry.</p>
<p>Vertex: (-2, -1)
Roots: (-3/2, 0), (-5/2, 0)</p>
<p>y = a(x-h)^2 + k
y = a(x+2)^2 - 1
1 = a(-3/2 + 2)^2
1 = a(1/2)^2
1 = a(1/4)
a = 4</p>
<p>y = 4(x+2)^2 - 1 = 4(x^2+4x+4) - 1 = 4x^2 + 16x + 16 - 1 = 4x^2 + 16x + 15</p>
<p>a > 1.</p>
<p>Even though this is the first time i took the SAT, it did seem a lot easier than i expected.</p>
<p>i thought it was inclusive because it said the ratio should be “at least 1:8”</p>
<p>Would 9 work for the ratio?</p>
<p>is 5 an acceptable answer for the gasoline question?</p>
<p>@burntflapjacks i dont think so. i think was 5-8 but i could be wrong</p>
<p>@RhythmMeleon</p>
<p>5 is not an acceptable answer. 5 / (40+5) = 5 / 45 = 1/9, which is less than 1/8.</p>
<p>I’d like to know if anyone else got the math team and academic team question. It was a Venn diagram problem where you had to figure out how many were exclusive to each team.</p>
<p>@OREngineering: that one has been answered several times already. The answer is 4.</p>
<p>It said, no less than 1/8 and no more than 1/5 ratio. So if there were 40 gallons of gasoline, then the least amount you can have is 5 and the most you can have was 8</p>
<p>so between 5-8</p>