1/(x+1) + 1/a(x+1) find the lcm​

Can someone pls ! pls answer all. no explanation needed..

The sum of two numbers is 12 and their difference is 18 what are the two numbers

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