If a number is added to twice the number the result is -9 what is the number

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Darragh has a golden eagle coin in his collection with a mass of 13.551\,\text{g}13.551g. an uncirculated golden eagle coin has a mass of 13.714\,\text{g}13.714g.