ilorty

@ Guest, not exactaly. Maybe you made a mistake in expanding.

We know that (x+1)(x-1) is x^2-1, because of difference of squares. (x^2-1)(x^2+1) is difference of squares, yet again, so this is x^4-1.

I'm not sure if you count constants as expressions or not. If so, then it is 0, if not, then it is 1. 

When adding two polynomials with different degrees, you usally take the degree of the polynomial that has a higher degree. That should help you find the degree of f(x)+g(x).

Hint: which is greater, 3 or 4? So, which one do you use?

:)

This question has been answered multiple times already...(your classmates probably asked it?)

Use the law of sines to find a.

So, we can say that 6/sin(58)=a/sin(109). You should be able to solve this with a calculator. 
 

For c, do the same thing, but instead, say 6/sin(58)=c/sin(13)

:)

Not exactly, but you are getting closer! Let's think about it case by case. 
 

So, you are right that there is one chief, so that is 10.

Now, don't go ahead and choose the officers first! First, choose your two supporting chiefs. So that is 9C2.

Next, we choose our officers. It is not 5C2, since 1) we do not have 5 left (9-2=?) and 2) you need 4 officers, not 2 officers.

Can you go from here?

:)

Do you really need to use "choose"? Can you form a simple premutation? 

P.S. I think you are overthinking...

:)

Is it a tinypic photo? TinyPic has recently shut down, and deleted the pictures of all the users who have had a free account...(sigh, competition between google photos...)...I'm no internet expert...but I think they might be gone forever? Just include the link of your previous question, and I may be able to reanswer it...

:)

We can change this shape into two easier shapes to deal with: 2 semi circles and 1 rectangle.

Now, we see that 2 semi circles is equal to one circle. So, let's first calculate the area of the circle. That is pi(r^2), which in this case is 16pi. (I got the radius from half of 8)

Now, what about the rectangle? We know that the width is 8...but what about the length? Well, it's not 18! As you see, we need to subtract 2r, which is 8, from 18. This gives us 10. So, 8(10) is 80.

Now, adding the two areas together, we get 80+16pi.

:)

Let TU and VW be chords of a circle, which intersect at S, as shown. If ST = 3, TU = 15, and VW = 3, then find SW.