Asix-sided number cube is rolled five times, x is the number of times an even number is rolled.

which statement is true about this situation?

a. the variable x does not have a binomial distribution because p(success) is not constant.

b. the variable x has a binomial distribution. p(success)=0.5; number of trials = 5

c. the variable x does not have a binomial distribution because there are more than two possible outcomes.

d. the variable x has a binomial distribution. p(success)=0.2; number of trials = 5

Step-by-step explanation:

A six sided die has three even numbers, and each roll is independent, so P(success) is constant at 3/6 = 0.5.  Since it's constant, the variable X does indeed have a binomial distribution.

So the answer is the second one, which you have selected.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.