Suppose one person sends a letter to seven people, and the following week those seven people send a letter to seven other people. If this pattern continues, how many letters will be sent out on the fifth week?

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?

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

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers