<p>can someone show their work for the “2x^2+4x+k” problem, i really dont seem to remember it</p>
<p>OKAY NO! The one with the circle with center (5,7) could not have been 14!
You needed to add 7 to the radius of the circle which was √5^2+7^2
Did anyone get 15.6 or am I being a complete ■■■■■■ >.>
I honestly spent like 6 minutes on that question</p>
<p>Sorry asinine16, but you needed to use distance formula from the center to the origin (0,0) to find the radius. Then you would do the distance formula again to solve for the y point.</p>
<p>Oh and I don’t remember the k question, could it have been experimental? I had extra CR</p>
<p>@weihao, that is what I did! I got √74 which was the radius right?
Then add it to 7 which was the y-cordinate of the center and you get the y-coordinate for P, no?</p>
<p>Wait, it is not 14 or what? Shoot. </p>
<p>Also, I have no recollection of the K question.</p>
<p>Please correct me if I’m wrong but I’m fairly certain that the question about the circle said that point P was the origin.
For the question about the primes I’m also pretty certain that it said consecutive.</p>
<p>It probably is 14, but I don’t understand why! I did everything possible to that question, I raped that circle with my pencil!
Ugh, I’m sad now …</p>
<p>Point P was not the origin, it was just another point on the y-axis that the circle intersects</p>
<p>Oh *<strong><em>, was it 12.17? Ugh *</em></strong> **!</p>
<p>Positive that circle was fourteen.</p>
<p>I thought that the primes were consecutive, but in hindsight, it doesn’t really make sense. Saying “consecutive primes” doesn’t really seem to make sense, especially because it said it had to be higher than two.</p>
<p>the answer is 14. If you just drew a line from the origin you could see that 7 was halfway to P.</p>
<p>■■■. That question was free response right? It was worded very trickily.
And I’ve seen practice tests say consecutive primes before.</p>
<p>wait… are you guys serious! did you guys all getting 3 wrongs for the whole questions?! there were like 40 questions!!! wow… I left like 10 blanks and prob got lots of wrong… lol 
I thought it didnt matter much unless u get more rights of %50 of the math test :D</p>
<p>help me out here?</p>
<p>how do u know which one was experimental?</p>
<p>But the x-axis of the graph was in the way…am I being really ■■■■■■■■ here…omg</p>
<p>And I am 100% sure it did not say consecutive, that was another problem you guys !</p>
<p>Yep. 14. P is on the Y-axis. And to solve it, you don’t solve for the radius of the circle, you are finding the distance of the line inside that circle. If you just drew two right triangles, you can see the simplicity of the problem and recognize that it’s just two of the same triangles with height 7.</p>
<p>0,0 is a point on the origin.
5,7 is the center.
We need to find the radius.
(x-5)^2 + (y-7)^2 = r^2
put in 0,0 and you get r^2 = 74
So we know the point that we’re trying to find has an x coordinate of 0.
So…</p>
<p>(-5)^2 + (y-7)^2 = 74
(y-7)^2 = 49
y-7 = 7 OR y-7 = -7
Thus, y = 14 or 0.</p>
<p>It is definitely 14.</p>
<p>i did 10/40 so i thought 1/4 but x should be 1 till 10 so i am not sure</p>
<p>Omg nvm it was 14, wow i am a fail, i made it so much harder on myself</p>
<p>Thanks for the clarification!</p>