What is 7/8 - 4/5 = what is 7/8 - 4/5

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

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

What is r i 4.5+10r=-6.5 with work pls