Find the perimeter of this trapezoid

Can (2,3 and square root 10) be sides ona right triangle?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons