Determine the degree of the following polynomial:

-7xy³z²

Which of the following polynomials is written in standard form?

Determine the leading coefficient of the following polynomial:

-8x - x³ +7x - 2

Add the following polynomials:

(x³ + 6x - 5) + (-6x² + 4x + 3)

Add the following polynomials:

(12x² + 3x⁴ - 6x - 2) + (-3x⁴ + 5x + 9 - 7x²)

Subtract the following polynomials:

(6x² + 10x - 9) - (4x² - 13)

Subtract the following polynomials:

(-5x² + x³ - 2x + 3) - (-5x² -x³ + 4x + 8)

What is the Perimeter?

The perimeter of the
 triangle is  $10x+20$  . Find the length of the missing side.