<p>Could someone explain the question…</p>
<p>ax^2+bx+c=1
x^2+bx+c=-5</p>
<p>How does a come out to 7? Seems like I should know this but it’s not coming to me…</p>
<p>Also, for the two square pyramids and cube (with edges 5), find the surface area - the aggregate answers seem to have a typo (says 100 + 5root3), I think the only options close to that were 100 + 25root3 and 100 + 50root3, anyone know which one it was?</p>
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<p>54 - 2 omit = 52 - 5 wrong = 47 - .5 = 46.5 is usually around 670 - 680. :(</p>
<p>I put 100 + 25 root 3 but maybe I’m wrong. Can we get a consensus on this question?</p>
<p>100+50rad3</p>
<p>I think that it may have a somewhat generous curve. It was by no means easy, their were many hard/tricky questions.</p>
<p>I hope its
-1 780
-2 760</p>
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<p>I put 100 + 50 root 3, but I guessed between that and 25 root 3. Can’t figure out the right answer now regardless though… If I had to guess again I’d say 25 root 3.</p>
<p>edit: @Flcollegeman - Really? How? If you don’t remember the problem it was…</p>
<p>A cube has two square pyramids attached to its sides. All edges are of length 5. What is the surface area?</p>
<p>@caperi. x=-1 so sub that in and u get A-b+c=1 and 1-B+c=-5 subtract those equations from each other and u get A-1=6 correct? A=7
for the sq pyramids it was definitely 100+5root3</p>
<p>Does anyone remember what the question asked specifically? Because I did the problem twice and still got 25 root 3.</p>
<p>@evilpanda - Wow I fail…completely forgot about having the x value from it giving you the function values…Ugh. Thanks</p>
<p>100 + 5root3 was an option? </p>
<p>@blue2142001 - I’m pretty sure this has all the info: A cube has two square pyramids attached to its sides. All edges are of length 5. What is the surface area?</p>
<p>Surface area of the cube = 100</p>
<p>Draw the triangle, base = 5 and height = 5√3 / 2
So surface area of one pyramid = 4 * (1/2)bh = 2<em>5</em>(5√3 / 2) = 25√3
Surface area of both pyramids = 50√3</p>
<p>the area of each triangle is .5(5)(4.3301) and their were 8 of them and 100 was the area of the squares</p>
<p>edit: deleted</p>
<p>how did you get the height? 5root3/2?</p>
<p>@caperi sry typo it was 50rt 3 @_@ LOL im mad tired rite now from browsing for 6 hrs IHFIWAOFHIA</p>
<p>how did you know it was 30-60-90?</p>
<p>the surface area of the cube is 150, 25 times 6 for sure</p>
<p>I left that dumb surface area one blank lol. I wanted to guess, but then I didn’t, even though I narrowed it down to the ones with the 100 + radical something.</p>
<p>I left the second to last fill-in blank, I put 36 for the perimeter of the two different sized squares, which was 48 (but I changed it, urg). And then one was y=kx^2 and I put .7 as a guess but later I realized it was 1.4. I hoping for like a 700?</p>
<p>whats y=kx^2? i dont recall that one</p>
<p>@futuresuccess, sry but the SA of the cube was 100… 50 of it is blocked off by the pyramids</p>
<p>the answer is 150 + 50 root 3. I knew it but i put 150 + 25 root 3 smh.</p>