Solving Systems of Equations in Three Variables — Unit test Answers

Dylan uses the expressions (x2 – 2x + 8) and (2x2 + 5x – 7) to represent the length and width of his bedroom. Which expression represents the area (lw) of Dylan’s room?

Which monomial is a perfect cube?

Which is the completely factored form of 18x4 – 42x3 + 24x2?

Which expression is equivalent to ?

Which expression is equivalent to ?

The volume of a rectangular prism is given by the formula V = lwh, where l is the length of the prism, w is the width, and h is the height. Which expression represents the volume of the following rectangular prism?

What is the greatest common factor of the terms in the polynomial 12x4 + 2x3 –30x2?

Which expression is equivalent to ?

Holly finds that (11m – 13n + 6mn) – (10m – 7n + 3mn) = m – 20n + 9mn. What error did Holly make?

The length of a rectangular field is represented by the expression . The width of the field is represented by the expression . How much greater is the length of the field than the width?