I WILL MARK BRAINIEST PLEASE HELP ASAP used when 40 pieces of
The number of pens used varies directly with the number of pieces of paper needed. If 12 pens are
paper are needed, how many pens will be used when 240 pieces of paper are
needed?

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?

Answer for 10 points show work you guys in advanced < 3

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585