Question

Please check if this is right?

Answer 1

A rectangle has sides measuring (4x + 5) units and (3x + 10) units.

Part A: What is the expression that represents the area of the rectangle? Show your work to receive full credit.

Part B: What are the degree and classification of the expression obtained in Part A?

Part C: How does Part A demonstrate the closure property for polynomials?

Answer 2

Part A: Expand the product (4x+5)(3x+10) and get the expression:

(4x+5)(3x+10) = 4x* (3x + 10) + 5*(3x + 10)
= 4x*3x + 4x*10 + 5*3x + 5*10
= 12x^2 + 40x + 15x + 50
= 12x^2 + 55x + 50

Part B: It is 2nd degree trinomial.

Part C: It shows that it is closure property, because it is a polynomial multiplied by polynomial and it equals a polynomial. That is basically the closure property.

Answer 3

@hartnn

Answer 4

good work!
everything looks fine :)

Answer 5

" A: area = length x width

= (4x + 5)(3x + 10) = 12x^2 + 55x + 50

B: the degree is 2, making it a quadratic expression

C: I think they mean the product of two polynomials

is a polynomial. "
i thought that Might help you.

Answer 6

thank you guys srry lost internet connect for the 50th time today geesh! May you help with one more and then i will stip bugging you ?