Rewrite -30 - (-24) +20 -7 in a different equation

And I don’t know how to do the N P chart

Can someone me with the property questions for 12 13 and 14 plz

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?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?