There are 8 red, 5 blue, and 2 green marbles in a hat. Without looking, what is the probability of picking a blue marble?

1 / 3

Step-by-step explanation:

Probability can be represented as the amount of desirable outcomes divided by the total number of outcomes.

Because there are 8 + 5 + 2 marbles or 15, it would the total number of outcomes.

The desirable outcomes can be represented as blue marbles, which there are 5 of.

Using this and the formula above, the probability for picking a blue marble is 5 / 15 which simplifies to 1 / 3.

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i