Which of the following examples represents a proportional relationship?

A Wes is making an online purchase. He
pays $3 per item plus $5 for shipping.

B Wendy's cell phone plan is $20 a
month plus $0.10 per minute.

C Kristin is buying lunch meat from her
local deli. It is $4.95 per pound.

D Jessica is a member of the local book
club. She pays $10 a month for her
membership but gets her books for $3
each.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Someone answer asap for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

Point s lies between points r and t on . if rt is 10 centimeters long, what is st? 2 centimeters 4 centimeters 6 centimeters 8 centimeters