Steve bought a total of 6 packages of pens, and each package contained either 3 or 7 pens. if exactly 4 of the packages steve bought a package that contained 7 pens, how many pens did steve buy? a) 21 b) 28 c) 30 d) 34 e) 42

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