Does this graph represent a function?why or not? A)No, it is not a function because it has two open circles
B)yes, it is a function because it passes the vertical line test
C)yes, it is a function because it passes the horizontal line test
D)no, it is not a function because it does not pass the horizontal line test

3x + 4y = 5 x- 3y = -7 solve by substitution

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.

What is the inverse of the function f(x) = 2x + 1?