A small rectangular package has an area of 9x square units and a height of 5 units. A large rectangular package has an area of 6 square units more and a height of 3x units more than the small box. Which of the following equations could be used to determine the volume of the large rectangular box? A. y=(27x2+63x+30)cubic units B. y=（27x2+30)cubic units C. y=(15x2+8)cubic units D. y=(12x2+23x+11)cubic units

Demonstrate the proof of your new polynomial identity through an algebraic proof and a numerical proof in an engaging way! make it so the whole world wants to purchase your polynomial identity and can't imagine living without it! you must: label and display your new polynomial identity prove that it is true through an algebraic proof, identifying each step demonstrate that your polynomial identity works on numerical relationships create your own using the columns below. see what happens when different binomials or trinomials are combined. square one factor from column a and add it to one factor from column b to develop your own identity. column a column b (x − y) (x2 + 2xy + y2) (x + y) (x2 − 2xy + y2) (y + x) (ax + b) (y − x) (cy + d)

The triangles are similar. what is the value of x? show your work.

Which expression is equivalent to 2x^2+7x+4?