Find the measure of the arc or angle indicated. Find m angle FDE

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?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

What percent of 18 is 24? and plz explain thx.