Iam having trouble with this ellipse problem. right away

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.