Which of the following are polynomials? A. x2/3+0x+1
B. x3+2x+2
C. 2/3x2+x+1
D. 2/x3+x+1/2
E. x2 + x + 1/x2+1

What is the factored form of x2 − 4x − 5? (x + 5)(x − 1) (x + 5)(x + 1) (x − 5)(x − 1) (x − 5)(x + 1)

1. are the triangles similar and if so why? what is the value of x? show your work.

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?