I really need help for this please help

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

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?