Roger has a nail that is 12 centimeters long. he measures and records the length of the nail as 15 centimeters. what is the percent error in roger's measurement?

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

∆red ≅ ∆ by rule will give brainiest if possible

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?