Find the extreme values of f(x y)=xy subject to the constraint x^2 + y^2 -4 = 0

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

How do i put 3(x+7) in distributive property