Find f ° g and g ° f , if they exist. f={(−4, −5), (0, 3), (1, 6)} and g={(6, 1), (−5, 0), (3, −4)} PLEASE HELP ME YALL

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

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?