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1. ### Find the constant k from the joint probability function of two random variables?

Remember that the sum of all (nonzero) probabilities should equal 1. So, we need P(1, 1) + P(1, 2) + P(2, 1) + P(2, 2) = 1 ==> 3k + 4k + 5k + 6k = 1 ==> k = 1/18. I hope this helps!

1 Answers · Science & Mathematics · 18/03/2014

2. ### log de 1000 na base 0,001?

2 Answers · Science & Mathematics · 13/03/2014

3. ### log de raíz cúbica de 3 na base 3?

log₃(∛3) = log₃(3^⅓) = ⅓

2 Answers · Science & Mathematics · 13/03/2014

4. ### Elasticity of demand problem (calculus)?

Equation for Elasticity of Demand: E(P) = (dQ/dP)*(P/Q) Where: (dQ/dP) = derivative of the demand function P = Price Q = Quantity The demand function we're...

2 Answers · Science & Mathematics · 13/03/2014

5. ### how do you write an equation of a parabola with focus 0,3 and directrix -1?

directrix -1? directrix x= -1? or y = -1 ? P(x,y) on the parabola, focus F PH is the distance to the directrix so PF = PH

1 Answers · Science & Mathematics · 04/03/2014

6. ### Can you help me solve this geometry word problem?

Area of the dodecagon: did you make a diagram ? you can make 12 isosceles triangles whose legs are 14 cm (made of radii) and whose central angle is 30º the area of one of these triangles is: (1/2)(14)(14)(sin 30...

1 Answers · Science & Mathematics · 04/03/2014

7. ### help!! illustrate and solve the problem presented below. show your complete solution.?

...point F, we have to solve for triangle FPQ to get the values of PF and QF. The distances from P and Q to the flagpole...

2 Answers · Science & Mathematics · 13/02/2014

8. ### Prove that each element of G appears precisely once in each row and each column of the binary table of G?

PF: Let G be a group and let x,y,z be in G, such that If...

1 Answers · Science & Mathematics · 30/01/2014

9. ### How do you graph a parabola with only the vertex and directrix given?

...1) you can find the equation directly P(x,y) is a point of the parabola PF = PH (where H is the projection of P on the directrix) ...

2 Answers · Science & Mathematics · 17/01/2014

10. ### Need help with inequalitys?

Inequalities are just like equations but the only difference is that when u multiply a negative number the sign of the inequality changes. say for example 4 > 3 which is true now multiply by -1 on both sides so -4 < -3.Note if u don...

3 Answers · Science & Mathematics · 13/01/2014