Please help me! I will mark brainliest! Which expressions are polynomials? Select the two correct answers. (2 points)

A. x4+2y2+z−w2
B. x−3+x√
C. x−3−x+1
D. −4x8

9514 1404 393

  A, D

Step-by-step explanation:

Only expressions that are constant, or with variables to positive integer powers are polynomials.

A square root is a fractional power. (eliminates B)

-3 is not a positive power. (eliminates C)

The remaining choices are A and D.

  A.  x^4 +2y^2 +z -2^2 . . . . is a polynomial

  D.  -4x^8 . . . . is a polynomial

2.56 is the width of the garden

step-by-step explanation:

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.