What is the value of r when 2r−21=2r+3(1−2r) ?

What are the soultion(s) to the quadratic equation 40- x^2=0

Which points are solutions to the linear inequality y < 0.5x + 2? check all that apply. (–3, –2) (–2, 1) (–1, –2) (–1, 2) (1, –2) (1, 2)

Which function has the domain x> -11