<p>@universalPB- For the prime number problem, I put down “2 is a prime number right” because the question asked which one of the statements would contradict the statement being questioned. 2 would contradict the question because it could not be derived from the 2k+1 equation, when k has to be an integer.</p>
<p>@educationOD ur wrong because it said if p is a prime number… k must be in integer… so if 2 is prime then k will not be integer… so it disproves it</p>
<p>And what about that 3x. question with the exponents ^-2x + x*something I said it doesn’t cross the x axis at all because it can’t be zero even if x is zero and for x -> -/+ infinity the first or second term would either go against 0 or infinity… So the equation could not equal zero, am I wrong?</p>
<p>do you guys think the curve will be really harsh this time around?</p>
<p>and can you skip 5 and still get an 800 (provided everything else is correct)? someone please tell me! :)</p>
<p>@amad3us it intersected the x axis once, when the first part before the minus sign equaled the second, so you had something minus the same something, which gives zero.</p>
<p>@liv4physicz- if you skipped 5 and you got every single one of the other questions right, then yes, you would get an 800. If you missed 1 or 2 though, you would probably fall in the 780-790 range</p>
<p>@Amad3us - I remember graphing the function on my TI-84 and saw one intersection when x was negative</p>
<p>Well, the prime number question was 2k+1=15. It can’t be simply 2 because then k would by 1/2 which isn’t an integer. And for the question about 3^2x, the answer was intersects the x-axis at one point. I’m pretty sure about this because I graphed and checked.</p>
<p>@Newton391244 - I think I put I and III, I’m not sure that’s right though.</p>
<p>wait i really think it was -8. it was some thing MINUS 24x, PLUS C, so -8, -16 would work. -8 was an answer.</p>
<p>Does anyone remember the answer to the “Indiana/Lake County” question?</p>
<p>@Newton391244 - yup i put I and III.</p>
<p>@treehugga - (x-8)(x-16) = x^2-24x+c, but it was asking for the root, so the roots would be 8 and 16, and only 16 was an option.</p>
<p>@btbam- wasnt that just dividing the total lake county population from the indiana lake county population?</p>
<p>@treehugga - It was 16 for sure, if you expand (x-16)(x-8) you get the polynomial x^2 - 24x + 128</p>
<p>@btbam: I think I got something like .32 for that one</p>
<p>I feel as though this is a test I’m going to have to retake because I omitted 7 questions on it. It was not at all like Barron’s this time around T_T</p>
<p>For the 180 divides n^k one, what did you put?</p>
<p>I put 30 because (30)^2 = 900, which 180 goes into 5 times.</p>
<p>I thought it meant 180/(n^k) = integer, but in that case…</p>
<p>(6)^2 = 36^1, and both are divisible</p>
<p>@Somestudent2: Yeah, I put 30 as my answer</p>
<p>Somestudent2 - It was 30 I believe, the format of the question was (n)^k and I tried doing 30^6, 30^7, 30^8, etc, and they were all divisible by 180</p>
<p>@somestudent 2 - The question was something like “for what n is n^k divisible by 180 if k is an integer” right? I put 30 too.</p>