Which statements must be true? Check all that apply. A'A = C'C

C'Q = QC

Line P T⊥ A'A

C'C ⊥ B'B

A'A || B'B

m∠TRB = 90°

Recall the definition of a polynomial expression. find two polynomial expressions whose quotient, when simplified, is. use that division problem to determine whether polynomials are closed under division. then describe how theother three operations-addition, subtraction, and multiplication-are different from division of polynomials.

Simplify (4x^2 - 8xy + 2y^2) - (9x^2 - 4xy - 7y^2) a. -5x^2 + 4xy + 9y^2 b. -5x^2 - 4xy + 9y^2 c. -5x^2 + 12xy + 4y^2 d. -5x^2 - 4xy - 5y^2

What is the value of x in the equation7x+2y=48 when y=3