You have 2 red marbles, 4 green and 2 blue marbles. what is the probability of pulling a red marble and then replacing the first marble and then grabbing a green marble?

1/8.

Step-by-step explanation:

There are a total of 8 marbles.

Probability of first drawing a red marble = 2/8 = 1/4.

Probability of drawing a green marble = 4/8 = 1/2.

So the probability of Red then Green = 1/4 * 1/2

= 1/8 (answer).

The probabilities are multiplied because the 2 events are independent.

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form