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1. ### Boolean Algebra help?

here is a link : http://en.wikipedia.org/wiki/Boolean_algebra

1 Answers · Science & Mathematics · 04/11/2012

2. ### The probability of the number of days before a new machine will become operational is given in the following?

a) P(A) = P(5)+P(6) = .41+.20 =.61 b) P(B) = P(3)+P(4)+P(5) = .08+.24+.41 = .73 c) P(A')=1-P(A) = 1-.24= .76 d) A= {5,6} B= {3,4,5} A∩B = {5} P(A∩B) = P(5...

1 Answers · Science & Mathematics · 06/10/2011

3. ### Need Help with Algebra 2 and I have a test tomorrow?

q15 use the formula P(A or B) = P(A) + P(B) - P(A & B) P(3 hearts) + P(numbers less than 5) - P(both) = (C(13,3) + C(20,3) - C(5,3))/C(52,3) = 354/5525, ≈ 6.4...

1 Answers · Science & Mathematics · 27/05/2013

4. ### Gradient/partial derivatives and proof?

Essentially the same calculation that you did, tells you that if you first fix an arbitrary constant c and let g(t) = f(t, -2t + c), then g'(t) = 0 for all t. In particular, for any t we have f(t, -2t + c) = g(t) = g(0) = f(0, c). Fixing any (x,y) in R^2, putting c = 2x + y...

1 Answers · Science & Mathematics · 05/11/2013

5. ### help with complex numbers please!!!?

The square root of 25 is +5 and -5. +5 squared is +25. Squaring a negative gives a positive, so -5 squared is also +25. The square root of -1 is an imaginary number, referred to as i. So the square root of -25...

1 Answers · Science & Mathematics · 21/11/2009

6. ### majorly confusing matrix question!?

The capital i was a typo. It should have been a vertical line. For the reduced form, it should look like [bar{A}|bar{b}]. The matrix W will be that obtained by multiplying together all the elementary matrices...

3 Answers · Science & Mathematics · 05/04/2007

7. ### Help with Boolean Algebra!?

Given: A&B = 0 A+B = 1 (A + C) & (A' + B) & (B + C) Expand and simplify: (AA' + A'C + AB + BC) & (B + C) (A'C + AB + BC...

1 Answers · Science & Mathematics · 02/10/2008