Which sets of ordered pairs represent functions? A. {(15,-3), (-6, 9), (-3,0), (-1, 16), (5,5)}
B. {(6.0), (-12, -16), (-6, 10), (20,-7), (16, 9)}
C.{(12, -18). (15, 1), (12,5), (0, 9), (-5, -17)}
D.{(-13, 4), (7, -15).(-13, 9), (6, -12).(-18, 0);
E.{(10,9).(-2, -16).(-6, 7). (5,8), (8.-16), (-11, 9)}

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

An airplane consumes fuel at a constant rate while flying through clear skies, and it consumes fuel at a rate of 64 gallons per minute while flying through rain clouds. let c represent the number of minutes the plane can fly through clear skies and r represent the number of minutes the plane can fly through rain clouds without consuming all of its fuel. 56c+64r < 900056c+64r< 9000 according to the inequality, at what rate does the airplane consume fuel while flying through clear skies, and how much fuel does it have before takeoff? the airplane consumes fuel at a rate of gallons per minute while flying through clear skies, and it has gallons of fuel before takeoff. does the airplane have enough fuel to fly for 60 minutes through clear skies and 90 minutes through rain clouds?