Solve the system of equations using the substitution method. -x − 2y = 0 y = -8x

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

Which graph shows the solution set of x^2+4-12x/> 0

Brad earns $12.75/hr and works 40 hours a week. what is his gross annual income?