<p>for the similar triangles, i just did law of sines, i think law of cosines was only used once (in 3,4, sqrt(37)) question, which i forgot to use x.x</p>
<p>thefyingazn
I used law of sines and proportions for similar triangles</p>
<p>I’m pretty sure 15 was prime number one cuz 13 and 17 are prime but 15 isn’t. What was a(10) for the last one it was that times i</p>
<p>what was the prime number question? i put 15 i think</p>
<p>mathisfun111
I put 15 because to have a counterexample, you needed n-2 and n+2 to be prime, but n NOT to be. For 25, n+2 = 27, which isn’t prime</p>
<p>For the prime number question its 23 I think because 21 and 25 are not prime.</p>
<p>For the prime number one I put 15.
15 - 2 = 13. Prime
15 + 2 = 17. Prime
And 15 is not a prime number.</p>
<p>Why doesn’t it mean how many scored between 70 and 90? How are you supposed to know to use quartiles?</p>
<p>Sorry tex n+ or - 2 had to be prime so it’s 15 what was a(10) for the last problem</p>
<p>@Techhexium That’s what I put</p>
<p>**Techhexium **
23 is a counterexample to “if n is prime, then n-2 and n+2 are prime”, but the given statement was “if n-2 and n+2 are prime, then n is prime”, so the counterexample would be n-2 and n+2 are prime, but n isn’t.</p>
<p>oh, i meant to type 15 :P</p>
<p>what was the one with I, II, and III?</p>
<p>I: Graph F(x) and g(x) and find the x-value where they intersect
II: Graph F(x) and G(x) and find the y-value where they intersect
III: Graph h(x)=f(x)-g(x) and find the zeros</p>
<p>Jonnypun
Earlier, people said the answer was I and III only.</p>
<p>Because you don’t know how many scored in a box and whisker plot unless they gave you numerical values in the question. You only know the scores 1st and 3rd quartiles, the highest value, and the lowest value.</p>
<p>Yeah I put 1 and 3 only for gods sake can someone tell me what a(10) was on the last problem</p>
<p>oh… =/</p>
<p>yeah i put I and III as well.</p>
<p>You’re not allowed to cancel just one score, right?</p>
<p>1 and 3 only as well. The y value doesn’t tell you much about the solutions to the equations.</p>
<p>As for the last one: the 10th one was (-2+i)</p>