Tell whether x and y show direct variation. Explain your reasoning. If so, find k.
y - 5 = 2x

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

The pyramid shown has a square base that is 24 centimeters on each side. the slant height is 16 centimeters. what is the lateral surface area?

Which expression is rational? 6. , square root two, square root 14, square root 49