5.8x+13.9=3.1x-15.8 solve for X

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

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

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?