Please help geometry*

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

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?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry