How do you solve 2/3 (6n + 3) - (8c - 5)

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?

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?