What are the solutions to f(x)=x^2+9

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Tan198=asin164=? how to solve this? ?

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?