Which of the following diagram(s) show a pure substance? A. not listed here

b. A, D, E, F, H and I

c. A, B, C, E, F and H

d. A, B, E, F, G, H and I

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!