PLSSS HELP I WILL MARK BRAINLIST

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?