20 point

complete the equation of the linear function.

y =
x +

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?