*50pts* timed test , will make brainliest simplify the following polynomial expression. (5x^4-9x^3+7x-1)+(-8x^4+4x^2-3x++5x -1)(2x-7)

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?