maths help?

Question

1. Find the ratio in which the line-segment joining (6,4) and (1,-7) is divided internally by the axis os 'x'?

2. The base radii of 2 right circular cones of the same height are in the ratio 3:5 ;find the ratio of their volumes?

3. Fill in the blank -
sin^2 5' x sin^2 10' + __ +sin^2 85' + sin^2 90' = 19/2

this is my kind request to all those people who pretend to be maths - experts ;plz don't waste ur time in giving rude or irrelevant answers ;if the answers are known to u ,then plz help by answering or else keep ur silly answers to urself as i don;t require them at all. I wud be very obliged and grateful to those people who try to help me giving the relevent answers. Thank you.

Answer 1

1)

let the point on x-axis be (x,0)
now u can solve easily by applying section formula
answer is m1:m2=4:7

2)

ratio of vol= 1/3pi r^2 h / 1/3pi R^2h= r^2/R^2 = (r/R)^2= (3/5)^2=9/25

vol of smal cone : vol of big cone = 9:25


3) i cant solve 3rd one

Answer 2

1. The line passing through (6,4) and (1,-7) has a slope of 11/5.
Its equation is y = 11x/5 -46/5. It crosses the x-axis at (46/11,0)
The distance fro (6,4) to (46/11,0) is sqrt((6-46/11)^2+ 4^2). The distance from (46/11,0) to (1,-7) is sqrt((46/11-1)^2+7^2). So just
divide the first distance by the second distance and you have the required ratio.

2. V1 = 1/3 pi (r1)^2h
Since r1/r2 = 3/5, r2 = 5r1/3, so
V2 = 1/3 pi (5/3r1)^2h
V1/V2 = r1^2/(25/9)r1^2 = 9/25

3. If those ' signs mean degrees, then
sin^2 5 = .007596
sin^210 = .0301
sin^2 85 = .992
sin^2 90 = 1
So 1.992 + x = 19/2
So x = 19/2 -1.992 = 7.51
This was a strange problem.

Answer 3

i'm maths instructor sending you this techniques: a million) do no longer restoration distinctive time, 2) activity is the motivating element to evaluate arithmetic. 3) very maximum severe element to be talked approximately is "practice Examples and workouts merely. 4) do no longer bypass over any financial ruin. 5) once you're a pupil of state board,do no longer study something from out area the text textile e book. 6) Refer previous year questions. 6) if ISC, you ought to refer greater books. 7) activity and tough paintings with confident could deliver you 100percentsuccesses

Answer 4

If you want all your homework done for you, enter them one at a time. You might get some answers.

Answer 5

wow..i suck at math, but there is alot of tutoring help you can get on the internet, just browse for "math answers" or something along that line.

Answer 6

English help also. Or maybe spelling.

Answer 7

???????????????????
oh please.....
dont do this to us ..LOL