Help please, I would really appreciate it. :)

The square root of 9x plus 7 plus the square rot of 2x equall to 7

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

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?