Find x if the average of 20, 15, 13, 17, and x is 18.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Miss henderson wants to build a fence around a rectangular garden in her backyard in the scale drawing the perimeter of the garden is 14 in of the actual length of a b is 20 ft how many feet of fencing what you need

You so much whoever answers with accuracy •the parent function of the graph of f(x) is the square root function, which was reflected across the x-axis. which of the following is the equation of f(x)?