Mathematics

Another hard math problem!

i have another hard math problem.....and anyway thanx for all your previous answers, they rlly helped me on my homework.... i dont know how to approach this equation... (3n+3)! / (n-1)! = 126-No solut

If a/sinA=b/cosA, show that sinA cosA = ab/a^2+b^2

Any help is much appreciated! Ive spent the last 2 hours on this question..-Given : a / sin A = b / cos A = k, say ..... (1) ∴ a = k. sin A, b = k. cos A ................... (2) ∴ a² + b² = k² .....

Help please with simplifying

i forgot my maths book in my locker and i only have my homework sheet that i put in my planner and now im stuck on these questions, can someone give me the working out so i can figure out how to do th

Taylor series question

can someone please explain to me how to get the Taylor Series for f(x)=1/6x-7-We want to get the denominator in the form a/(1 - r). To do this, divide the numerator and denominator by the constant in

Parametric equation problem...helps.......

A particle is moving in a curve according to the parametric equations x=3cos t ,y=2sin t , for 0 Question a, In which direction is the particle moving? b, Find the equation of the line tangent to t

If c dollars are deposited in an account paying annual percent interest,

approximate the amount in the account after x years if c=$250, r=2.0%, and x=19 years..-You need to define whether the interest is simple or compound. Compound interest: A = P*(1+i)^n simple interest:

Volume/surface area question in geometry! Please help

An oil storage tank installed at a refinery is a right cylinder with diameter 18m and height 10m. 1.) The tank rests on the ground. Find the surface area of the tank that can be painted. 2.) The tank

Help factorize difference of two squares with fibonacci

Using F(n+1) = F(n) + F(n-1) show that: (F(n+2))^2 - (F(n+1)^2 = F(n) * F(n+3) Please help asap :)-F(n+2) = F(n+1) + F(n) so F(n+2)^2 = F(n+1)^2 + 2F(n+1)F(n) + F(n)^2 so F(n+2)^2 - F(n+1)^2 = 2F(n+

How do i solve this problem

i dont know exactly how to solve this problem: a classroom has two rows of 8 seats each. there are 14 students, 5 of whom always sit in the front row and 4 of whom sit in the back row. in how many wa

How do you solve 5/2x + 3/4 = 9/4x

The equation 5/2x + 3/4 = 9/4x is in fraction form and has been troubling me for quite a while now. I keep getting the solution as -1/3 but when i go back to check, the solution does not work. Is the

Need some help with middle school algebra.

I really dont understand algebra that great. I can do it, but I feel Im just using common sense. 4x + 7 = 27just for an example. I know that I need to get to 20 to at the 7. So I go 4*? = 20 .. and

Solve the following equations please...

11. Solve the following equations: a. 8n/11 + 2 =10 b. 3x-5/2 =5 c. 3 (7g+12)= -48 12. a. 7j-12= 10j+9 b. 5x-4= 7x+6 c. –(13-s)= 14(7s+6) d. 2(x-4)= 5x-16 13.a. 2x-3> 5(this sign (>) has a line un

Another gcse maths q help please!

Simplify fully x^2 + x - 6 / x^2 - 7x + 10 Thanks-You need to factorize the top and bottom part of this expression, with a view to finding a common term that will cancel itself out, as follows: (x

What is (y2-y1)/(x2-x1) FOR

is it to get a perpendicular line? or what in the y=mx+ctopic in GCSE maths-Two points on a line are ( x1 , y1 ) and ( x2 , y2 ) Gradient m is then given by :- y2 - y1 ------------- x2 - x1-In the

Help with gcse maths

john and alice are planning a holiday, they are going to stay at a hotel. john and alice will stay in a double room. they will eat dinner in the hotel everday. they can stay at the hotel for 3 nights