How do you solve and graph this equation

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

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

X-10/4 when x = –18 a 7 b –2 c –7 d 2