<p>The question which said there was an isosceles triangle with sides 5,10,10 asked you to calculate the largest angle right? </p>
<p>So…</p>
<p>c^2 = a^2 + b^2 - 2abcosine(C)</p>
<p>5^2 = 10^2 + 10^2 - 2(10)(10)cosine(c)
25 - 200 = -2(100)cos(c)
-175/-200 = cos(c)
cos(c) = .875
Do inverse cos(.875) you get = 28.955 deg. which is…the SMALLEST angle. so
180 - 28.955 = 151.044
since its isosceles, divide this angle by 2 to get the largest angle
151.0444/2 = 75.522 degress. Which was an answer i belive. thats what i put. im pretty sure this is right.</p>
<p>Harvard- it wasnt the largest angle, it was the angle between both congruent sides, which was the angle between both 10s which was the smallest ones which was 29.</p>
<p>the answer to the: x^2+k was k<0 not <=0 because when you have a multiplicity of 2, the value does not cross the x-axis. Therefore, all values have to be less than 0. If it were 0, the graph would be touching the x-axis, and not crossing.</p>
<p>I don’t think it counts as crossing. It is an x-intercept, no doubt, but the question specifically asks if it crosses the axis and when there is a multiplicity of a zero, it doesn’t count as crossing. The equation, y=x^2 has the zeroes 0 and 0 (multiplicity of 2). In Calculus right now, I am learning how to find the maximum and minimum values of a graph just by looking at the derivative. When the graph of the derivative crosses from positive to negative or from negative to positive, you have a relative extrema. But when the graph only touches a certain solution-(0,0) in our case, it has no relative extrema because it is not considered crossing the x-axis. Hopefully someone who has taken calculus knows what I am talking about and I hope I justified my answer enough.</p>
<p>I have to agree with ^^. Initially, I was convinced I was wrong by the consensus that it was k <= 0, but I do not believe touching to be an intersection. </p>
<p>“x-Intercepts
The roots of a polynomial function correspond to the x-intercepts of its graph.
If a root has odd multiplicity, the graph crosses the x-axis at the corresponding x-intercept.
If a root has even multiplicity, the graph touches but does not cross the x-axis at the corresponding x-intercept.”</p>
<p>I`m tired of people asking about their score, it’s not that hard to find a conversion chart. Stop being lazy. Sparknotes gives a rough estimate. </p>
<p>o1xDanny - um i’m not being lazy, maybe you’re the one being lazy… i had already stated on page 7 that i had looked in the collegeboard book for the official conversion chart, but with the variables of difficulty for each test and the resulting curve, i wanted to know what people’s estimates would be this time.</p>
<p>With 13 skipped, you’re bound to have a couple wrong and the curve difficulty only fluctuates your scores plus/minus 10 while one wrong answer could drop you just as much. An answer from anyone here will simply be a restatement of the conversion chart. Hence, use the chart. </p>
<p>With a username like “loserbich” and comments such as “lol you need to shut up” and “lol”, I wouldn`t be accusing other people of being rude. And this imaginary post on page 7, I’d like to see it.</p>
<p>so you guys think putting (0,0) for x-int was wrong? I went for the definition ( x-int is where it crosses the x-axis, with the value of y=0). It totally make sense to me</p>