Line l passes through point (21,4) and line p is the graph of 7x−5y=16

.

If l⊥p
, what is the equation of l?

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

The graph shown is the graph of which function?

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary