Mathematics

I don't understand what I'm doing wrong here? (Binomial Distribution)

Heres the problem: On a quiz of 10 questions, a student guesses on all of them. Each question has 4 possible answers, with only 1 being correct, and each is independent of every other question. What

What is the sum of the exterior angles of a quadrilateral, hexagon, n sided polygon

sum of the exterior angles of a polygon is always 360° (irrespective of number of sides) so it 360° for a quadrilateral, hexagon, or n sided polygon ------number of sides / 360

Can you help solve 16=4w + 2w - 2

and can you help solve 2x - 8 + 3x = 7-Since you are asking for help with these questions, Im going to assume that youre struggling with some of the basic concepts of Algebra. Which is fine. Algebra

( cos 3a - cos a/sin 3a - sin a) + (cos 2a - cos 4a/ sin4a - sin 2a) = [sin a/ cos 2a cos 3a]

guys.. this problem was very difficult for me.. i almost tried everything.. pls help me.. mention the reason for each step.. pls help me.!!!!-... LHS = [ ( cos 3a - cos a ) / ( sin 3a - sin a ) ] +

How do you know if you can solve a matrix

i have this: [2 3 ][7] [4 5 ] [8]i got the answer: -5.5 and -6 is that correct? And how do you know when you can solve it?-There are 2 ways. You can write them as equations 2x + 3y = 7 and 4x + 5y

Find the value of sin (1/2x) if cos (x)= 1/8

Thxs-cos(x)=1/8 cos(x)=1-2sin^2(1/2x) (that a double angle formula cosK= 1-2sin^29K/2)) sin(1/2x)=sqrt((1-cosx)/2) =sqrt((1-1/8)/2) =(sqrt7)/4-sin^2(1/2x)=1/2-12cosx sin1/2x=1/2-1/8 sin1/2x=3/4

What is the first operation you should do to solve the equation

4x + 6 - 2x = 14 A. Combine the like terms, 4x and -2x. B. Divide both sides by 2. C. Subtract 6 from both sides. D. Multiply both sides by 6. Solve the equation. 4x + 6 - 2x = 14-you can do either

Calculus Help! - Revolving an area about a line! 10pts!!

Find the volume of the solid for the region bounded by the lines y=6-x. y=0, x=0 revolved about the line x=6. Can anyone also verify the shape, is it a trapezoid from 0 to 6 and a symmetrical trapezo

If Mr. Black and Mr. White both individually believe they are right, which one is right

Mr. Black believes X to be true Mr. White believe Y to be true They cannot both be true Can we philosophically come to a decision? Please give your arguments as to how you decide. Thank you for your

The world population in 1990 was 5.4 billion and in 1995 was 5.8 bilion. Use linear extrapolation to find.....

The world population in 1990 was 5.4 billion and in 1995 was 5.8 bilion. Use linear extrapolation to find the population in 2010.-Linear extrapolation just means that it follows a line.So youre given

Math problem help please!?!

If 75% of 800 recording artists are in the music industry for the love of music, but two-thirds of these later change their mind, how many of all the recording artists are doing it for the love of mus

What is the inverse of this function

f(x) = 2 - x - x^3-My first thought was that a cubic curve has two bumps in general, so in many cases a given value of f(x) will correspond to three values of x, which means it isnt possible to find a

Direction angles of a vector, equation of a plane

Consider the unit cube in the first octant with a vertex at the origin. P is the point (1, 1, 1) and Q is at the centre of the face of the cube on the plane x = 1. A) write the vectors OP and OQ in t

How to determine if two line intersects each other?!

Determine if line L1 intersects line L2. L1: [x,y,z]= [4, -3, 2] + t[1, 8, -3] L2: [x,y,z]= [2, -19, 8] + s[4, -5, -9] Please provide a theoretical solution on how to figure it out, I know how to fi

∫(0 to pi/2) min(sinx,cosx)dx,equals to:

1)2-sqrt2 2)2+sqrt2 3)2sqrt2 4)sqrt2-Split this integral at x = π/4 (which is where sin x = cos x). ∫(x = 0 to π/2) min(sin x, cos x) dx = ∫(x = 0 to π/4) min(sin x, cos x) dx + ∫(x = π/4 to π/2) min