2x^2−16x−4=0 quadratic equation

What are correct trigonometric ratios that could be used to determine the length of ln

Give me the equations of two lines that have the same slope but are not parallel.

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?