5.3.4 Practice: Modeling: Finding Parallelograms Please help (I am giving 100 points and will make brainiest)

I have attached the questions on a PDF down below

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?