In a certain county, the number of charter schools is 10 less than twice the number of alternative schools. we know that there are 46 charter schools in the county. how many alternative schools are in the county?

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?