Graph the quadratic function f(x) = -2x^2 + 5x + 2

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Solve the formula ax+ by = c for x.