Question

a car traveling 75 miles per hour is a description of a cars (select), while a car traveling 75 miles per hour north is a description of a cars (select) (select) velocity speed distance

Explanation:

Speed is a scalar quantity that only has magnitude (like 75 miles per hour). Velocity is a vector quantity that has both magnitude and direction. Since "75 miles per hour" has no direction specified, it is speed. When it is "75 miles per hour north", the direction is given, so it is velocity.

Answer:

A car traveling 75 miles per hour is a description of a car's speed.
A car traveling 75 miles per hour north is a description of a car's velocity.