Find the value of f(2)+3+g(−4) if f(x) = 2x−4 and g(x) = x^2 −4x

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

What is not true about kl and mn? what is mn? (show your work)

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a