Solve the systems of equations by using the substitution method, show your work.4y = x 5x - 10y = -50
Please. Help

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?