12n+2=-46 to find the match and complete the sentence

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?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)