Which of the following relations is a function? A.
(-9, 2), (-4, 3), (5, 7), (9, 2)
B.
(9, -10), (-9, 7), (9, 6), (-9, 12)
C.
(-9, 0), (-4, 5), (-9, -3), (5, 9)
D.
(-4, -2), (-9, -5), (5, 8), (5, 2)

Consider the reaction 2x2y2+z2⇌2x2y2z which has a rate law of rate= k[x2y2][z2] select a possible mechanism for the reaction.

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x