Add or subtract the following: 5.75+479.39−25.03 would i add or subtract this?

What are “like terms”? why can we only add like terms?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

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