How to find the radius of a cirlcle, and some of the other things listed in the question. 1 is ok.

What is the range of this function? all real numbers such that y ≤ 40 all real numbers such that y ≥ 0 all real numbers such that 0 ≤ y ≤ 40 all real numbers such that 37.75 ≤ y ≤ 40

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10