One way to compute a 20% discount is to multiply the price by 0.20. the price of a pair of sneakers is $84.50. Calculate the discount. Explain or show your reasoning. please help!!!

How to determine whether two known pairs of points are on the same line.

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.

The anwser cause i do not understand just plez