If a=(4,5) and b=(7,-9), what is the length of segment ab

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Solve the system of equations. y= 2x y= x^2 - 15

Find the amount in a continuously compounded account for the given condition. principal: $1000, annual interest rate: 4.8%, time: 2 yr