There are 5 envelopes in a box. the envelopes contain a penny, a nickel, a dime, a quarter, and a half-dollar. a person selects an envelope. find the expected value of the draw

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1