<p>No wait, but what about negative divisors/factors?
p^2 is divisible by -1, -p, -(p^2), 1, p, and (p^2). Wouldn't that be six divisors then? Does anyone know if the question specified that they were positive divisors?</p>
<p>hey does anyone remember what was the answer to the one near the end, where </p>
<p>if x(x+y)=10 and y(x+y)=3, what is the value of x+y?</p>
<p>I don't remember if that was the question EXActly, maybe some of you remember what I'm talking about and also the answer? I think i put down 13, but that was a complete guess.</p>
<p>Actually, that is the exact question but the answer is 3.6 because x = 2.77 and y = .84</p>
<p>How I solved it...</p>
<p>x(x+y) = 10 and y(x+y) = 3
I multiplied the first equation by .3 to make it equal to 3, so I could make the two equations equal to each other.</p>
<p>x(x+y) = 10
.3x(x+y) = 3</p>
<p>.3x(x+y) = 3 = y(x+y)
.3x(x+y) = y(x+y)
.3x = y</p>
<p>Take the first equation again and substitute .3x for y.</p>
<p>x(x+y) = 10
x(x+.3x) = 10
x(1.3x) = 10
1.3x^2 = 10
x = 2.77</p>
<p>Take first equation again and solve for y.</p>
<p>x(x+y) = 10
2.77(2.77+y) = 10
y = .8401</p>
<p>so answer = 2.77 + .8401 = 3.6</p>
<p>How did everyone do? 710 here, which is better than what I expected.</p>
<p>I got a 740. I want to retake it to up my score. I thought it was easy- I was expecting in the high 700's, and even hoping for an 800. </p>
<p>I hear in Math IC you have to get it near perfect for it to be a respectable score, is that right?</p>