Age problem. Dave is twice as old as Matt. Five years ago the sum of their ages was 44. How old are they now?

Find the missing dimension extra points

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?

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i