What is the property of 3x=y, then y=3x

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11

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

Measure a and b and find their sum. how are the angles related?