Help please triangles.

1. are the triangles similar and if so why? what is the value of x? show your work.

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?

What is the ordered pair of m’ after point m (5, 6) is rotated 90° counterclockwise?