The cost to mail a one ounce letter was 39 cents and the cost to mail a two once letter was 63 cents. what is the ratio of the cost to mail a one ounce letter to the cost to mail a two ounce letter

If a =6, what is the value of 2a(3b + 5c)?

What is the value of the expression below? 148+(-6)| + |– 35= 7|

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