I need help with this math problem it should be easy but im not good in math sooo... and could you give an explanation please. Thanks

Add the fractions and simplify 1/2+ 1/3

Which of the following is missing in the explicit formula for the compound interest geometric sequence below?

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?