Bryan cuts a piece of cardboard in the shape of a trapezoid. the area is 43.5 square centimeters. if the bases are 6 centimeters and 8.5 centimeters long, what is the height of the trapezoid?

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

Anyone know? is appreciated! will mark brainliest if correct!

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?