If a polyhedron has 5 faces and 7 vertices, then it must have how many edges?
A) 8
B) 10
C) 12
D) Other: (if other give a number please)

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

What is the total surface area of this square pyramid?