Dec 2012 - Math II Discussion

<p>@leatherlibrarian:
I got 24.14, too, for the perimeter of the isosceles triangle inside the cube</p>

<p>@burntflapjacks
Thanks. I’m going to try the problem again.</p>

<p>was the question about the doves the last one ?</p>

<p>The question with the x and y and whether they y is a function of x is that only the II graph was right, because the third all the values of y were 1/2, and that makes it a line y=1/2, not a function depending on the value of x</p>

<p>what about f(x)= 1/2? it worked fine</p>

<p>That just means no matter what x is (actually you have no where to plug in x), that the value is always 1/2. That does not fit what they were asking for: y function of x</p>

<p>Does anyone know how to start a chat room on here?</p>

<p>Graph: for which x values is the linear greater than the parabola?</p>

<p>Temperature of cheese:
And truth of the statement:
Ever reach 50 no ht
Time to reach a certain temp – 62
Begins at 75</p>

<p>Thoughts??</p>

<p>@Goingforivy
y=1/2 IS a function because it’s a horizontal line, so it passes the vertical line test.</p>

<p>@Goingforivy
Cheese Temp
I got 30 for when the temp reaches 65
and
I got I and II only for the second Q (III was false: the temp never gets to 50)</p>

<p>It could also be written y = 1/2 + 0x. It’s definitely a function of x.</p>

<p>yeah 1/2 definitely works, and the cheese never gets colder than 55 degrees. weak refrigerator lol</p>

<p>Y= cos(2x) + sin(x)
What is the difference between the max and the min?</p>

<p>@MelzidEril it is a function, but I remembered the problem asked for a y function of x, and if it is that case it would not work because y is not determined by the value of x that you plug into the function. I could be wrong though!</p>

<p>what the question about population doves question nº50?</p>

<p>@GoingforIvy
The vertical line test is used precisely to determine if y is a function of x.</p>

<p>@goingforivy</p>

<p>I got something like 3.125</p>

<p>@Goingforivy the difference was 3</p>

<p>@goingforivy i think the problem was cos(2x) + cosx, can anyone else confirm this? and i got 3</p>

<p>nevermind i got 3.125 for that sorry!</p>

<p>3 is the same as 3.125 or they were to different answer choices?</p>