Find standard form of the equation of the parabola with given characteristics and vertex at the origin. Passes through the point (-2,12); horizontal axis

Which expression is equivalent to -5(3x - 6/7)

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

Let x = a + bi and y = c + di and z = f + gi. which statements are true?