math

[Main]

I have a test first thing in the morning on Tuesday:(

I missed few classes and now I might be fucked.

could some one please be very kinda and write down the answer and solutions to these questions? (these are from the practice test, and I couldn't solve them).

http://img19.imageshack.us/img19/2196/workq.png

I forgot to add 1 detail to the first quest :(

[Brain]

what kind of calculators are you allowed to use?
Advanced? Any?

[Main]

any.

[Brain]

well its bed time, I'll what I can do in the morning, trig and geometry was quite a long time ago...

[mas0nj0rdan]

dont a right triangles sides always = 90deg 45 def 45 deg?

[Main]

what do you mean?

[ian.]

no.. that's only isosceles right triangle..

I know the angles.. but I'm not in trig so idk what else you need =X

[Main]

thanks,

but I don't understand why
2000 = X + Y + Z when x is the distance ship has traveled?

[nielsie95]

y² = z² + 140² - 280zcos150°
y² = z² + 140² + 242.487 ~Little note here - probably shouldn't round this yet.

Where do you leave the z here (280zcos150° to 242.487)?
And why is x 140?

[nielsie95]

Yeah, I think you are right :)

[Main]

omg I forgot a important role.

Ship carrier is also travleing at 35km per hour. sorry guys

EDIT:
Thank you guys soooo much, it helped me understand these things:)
Especially @Aequix:)

The answer that was given at the back of the book was (938km)
I'll look over your steps.

[mastaraymond]

Are you sure you don't miss any information at for the Triangle puzzle at the right?

[Main]

Yeah I am missing some side length.

I asked my friend and we solved the top 2 questions.
I'll remove that from picture.