My question says write an expression that represents n plus 7 multiplied by 3

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?

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.