Can someone help me with these questions please?! -1.2x = 12 and
x/9 = 4

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

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

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.