Which graph represents a function?

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

Let x = a + bi and y = c + di and z = f + gi. which statements are true?

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?