8 3/4 take away 3 and 5/7 show work

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?

Asequence is a function whose is the set of natural numbers

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each