18. (4 pts.) Saskia has worked at the cafe so long that she has memorized the amount of the common order. For example, four doughnuts and two coffees cost $4.80, while five doughnuts and three coffees
cost $6.45. What are the prices for one doughnut and for one coffee?
(Need to identify variables, set up equation(s), and SOLVE).

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212