The set of points (–4, 4), (2, 4) and (7, 4) are plotted in the coordinate plane. Which statement is true? A. The graph of the points is not a function. B. The slope of the line between any two of these points is 0. C. The first and second coordinates of each point are equal. D. The first-coordinates of the points are equal.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Two numbers have a sum of -19. one number is x. what expression represents the other number?

Larry wants to buy some carpeting for his living room. the length of the room is 4 times the width and the total area of the room is 16 square meters. what is the length of the living room