Which of the following could not be a valid solution to a compound inequality

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Atransformation t : (x, y) (x-5,y +3) the image of a(2,-1) is