[URGENT DUE 30th APRIL] Advanced maths

[Tr1gg4]

If anybody could help me out with the following..
I will worship you for a week lol...


But honestly - I have no idea what to due, and its due in tomorow.

1)Calculus : Max point x=3 on curve y=9x²-2x³. find the equation of the line.

2) f(x)=x³-4x²+5x-2
i) find remainder when divided by (x+2) [I FORGOT HOW ROFL]
ii) (x-1) is a factor of f(x)?
iii) solve f(x)=0

3) A triangle has sides 8cm, 7cm and 12cm. What is the largest angle?

4) A batch of glasses produce 14% defective glasses. 8 are randomly selected.
Calculate
a) None defective
b) at least 2 defective (nCr button right? forgot how lol)

5) dy/dx=a+bx (or was it +b) find values of a and b and the equation of the curve, given that it passes the points (0,2) (1,8) and (-1,2)

8) A car moves in a straight line. Velocity in meters per second, t seconds after passing point A is:

V=27-(1/8)t³​

The car rests at point B.
i) show car is at B when t=6 (substitution i got that far lol)
ii) find the distance AB

9) Using the identity Cos²Θ+sinΘ=1 show that
2cos²Θ+SinΘ=2 can be written as 2sin²Θ-sinΘ=0

ii) hence find all values in the range of 0≤Θ≤180 satisfying the equation 2cos²Θ+sinΘ=2

10)A circles equation is x²+y²-2x-4y-20=0. Find co-ordinates of the centre, C, and the radius.
ii) Find co-ordinates of point A and B whre line y=x+2 cuts circle (dont ask)
iii) Find angle ACB

ALL help appreciated lol!
thanks for looking!

 

[fiddle]

I'm only in geometry, so I only know the answer to number three. The answer would be the angle opposite the hypotenuse, which is the 12 inch side.

 

[Tr1gg4]

I'm only in geometry, so I only know the answer to number three. The answer would be the angle opposite the hypotenuse, which is the 12 inch side.

but how to work out the angle EXACTLY?

other than drawing it using compasses? and then measuring the angles is there another way?

Crap im failing this lol

 

[torque1992]

dont you have a math book and take notes in class?

im also in geometry and know #3 which is common sense to those that have worked with angles in math.

left side= 7cm
right side= 8cm
bottom =12cm

the top angle would be the largest angle because the bottom is the longest side which means the top angle needs to split more to make it connect.if you draw it out and used a protractor to measure it than you will see the top angle is


edit-- tr1gg4, a compass is the things you use to draw a circle not a triangle and you dont measure angles with a compass

 

[Tr1gg4]

actually .... if u do geometry u can draw very accurate triangles with compasses

by positioning a the compas to the required lenghts... you will get angle sizes to a accurate degree.
Its called construction - and i believe u will learn about it in the next 3 years... (LOL) heres a guide:

http://www.mathsrevision.net/gcse/pages.php?page=49

 

[torque1992]

actually .... if u do geometry u can draw very accurate triangles with compasses

by positioning a the compas to the required lenghts... you will get angle sizes to a accurate degree.
Its called construction - and i believe u will learn about it in the next 3 years... (LOL) heres a guide.

i jsut clearly said i was in geometry... wow......

 

[Tr1gg4]

ok posted the guide for you.. if your in geometry U SHOULD in theory know this.

 

[zmagik]

Just ask your teacher if you can stay after school for extra help, and if that doesn't work ask your parents or an older sibiling, I'm only in algebra so i cant help you. Good luck though.

EDIT: Just noticed that this is due tomorrow, google "math help" and look up the unit your on.

 

[Tr1gg4]

I so cant be asked...
This isnt even a course... its like an additional course ontop of the compulsary course.. and im driven to to well - but i forgot everything.. and need the answers so she doesnt mark me down.....

and the thing is - this is long and difficult shit... she screwed at me once (teacher) and im not coming up to her for another screw. trust me...

easier said than done.

Besides i have a french speaking exam tomorow.. which i havnt looked at since Novemebr
and i have to redo my statistics coursework by Friday lunchtime ... it takes 3 weeks to do by working 3/4 hours a day on it.....

IM FUCKED. so yeh... help overnight would help..

 

[jebckr]

Meh, we've covered most of this, but it's been a while and I didnt pay much attention.

Umm on number one just graph the equation with a graphing calc and find the slope of the tangent line at 3 and go from there.