Sahil's brother is three years old how many weeks old is his brother?

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Solve 2x+y=3 x+y=5 in substitution method

How many solutions does the nonlinear system of equations graphed bellow have?