If a polynomial consists only of the constant $5$, what is its degree?

Determine if the expression: $\frac{5x^{3}y}{x}$ is a polynomial. Show your reasoning.

Find the degree of the polynomial $G(x,y)=5x^2{y}^3-7x{y}^4+9$.

True or False: $x^4\cdot x^{-2}=x^2$

Multiply and simplify: (2x² + 3x - 1)(x² - x + 2). Provide the simplified quartic polynomial.

Select the best description for the expression $4x^2+0x+9$.

Which of the following equals ${(-\frac{3}{4})}^2$?

Simplify ${\left(\frac{3x}{4}\right)}^2$.

Given the equation $(\frac{2x}{5y}{)}^3=\frac{16}{125}$ with $x$ and $y$ nonzero, find $\frac{x}{y}$.

Simplify $3^{-4}$ and write the result in simplest fractional form.

Simplify $\frac{5}{x^{-2}{y}^3}$ and express your answer with only positive exponents.

Which statement correctly defines a negative integer exponent for a nonzero base $a$ and positive integer $n$?