Mathematics - 7 November 2007

how do i find the angle of intersection between the two planes given by:

3x + 4y + 5z = 8
2x - 6y - 3z = 0

all i know how to do is find the dot product of vectors, how to find their modulus and how to find the angle between them from that but i dont see how it applies here. can anybody help out?
cheers.

2007-11-07 02:53:44 · 2 answers · asked by fpa06mr 5

in a 5x5 table ,how many rectangles would be there ?

How to find ?

2007-11-07 02:41:33 · 4 answers · asked by calculus 1

Thank you for the last answer. I finally understood it. Now I need help with this one

2007-11-07 02:12:22 · 6 answers · asked by danielle 1

2007-11-07 02:05:04 · 5 answers · asked by smores 2

I need some serious help with logarithims.
I need to convert these equations to logarithmic equations

1. 16^3/2 = 64
2. e^x = 5

I need to write these logarthimic equations in exponential form.

3. log3 27 = 3 (Imagine the 3 is subscripted below the log)
4. log125 25 = 2/3 (Imagine the 125 is subscripted below the log)

2007-11-07 02:04:52 · 4 answers · asked by Hope C 1

2007-11-07 01:43:56 · 13 answers · asked by danielle 1

Dihedral group D_n of order 2n, (n>or=3), has subgroup of n rotations and a subgroup of order 2.

2007-11-07 01:39:27 · 1 answers · asked by Anonymous

the quadratic function f is defined by f(x) = x^2 + 6x + 11

1) express f(x) in the form (x+p)^2 + q, wher p and q are integers.
2)state the value for x for which f(x) is least
3) solve inequality f(x) is greater than 3
4) state the geometrical transformation which maps the curve y = F(x) onto y = f(x+2)

2007-11-07 01:28:21 · 2 answers · asked by Anonymous

2007-11-07 01:19:23 · 4 answers · asked by ilovedstny 1

36 is 15% of what number

2007-11-07 00:37:21 · 7 answers · asked by haaaaahaaaa! 1

If two probabilities are independant is the following true:
P(a u b) = P(a) + Pb) ?

Thanking you in advance.

2007-11-07 00:02:22 · 3 answers · asked by Anonymous