If the fallowing pair represents a direct variation, find the missing value.
(2,-4) and (-6, y)

What is the exact area of a circle with a diameter of 50 centimeters? a.87.9 square centimeters b.379.9 square centimeters c.1962.5 square centimeters d.4923.5 square centimeters

Which of the following expressions is equal to 2x^2+8

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression