The graph of f(x) = x is reflected over the y-axis. use the graphing calculator to graph this reflection. which list contains
three points that lie on the graph of the reflection?
(-81, 9), (-36, 6), (-1, 1)
(1, -1), (16,4), (36, 6)
(-49, 7), (-18, 9), (-1, 1)
(1, -1), (4, -16), (5, -25)

the 4th choice is the correct one

step-by-step explanation:

1) is right

step-by-step explanation:

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

answer: 4 (:

step-by-step explanation: