Trung bình cộng của ba số là số lớn nhất có hai chữ số. Tìm mỗi số đó, biết số thứ nhất bằng số thứ hai, số thứ ba bằng trung bình cộng của hai số đầu

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

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.

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?