Which expression is undefined?

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10