Determine the degree of the following polynomial:
$x^{3}-9x+3x^{5}$

Classify the following as a constant,linear,quadratic,or cubic polynomial:
$3x^3$

Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer: $x^{10} + y^{3} + t^{50}$

Write the degree of the following polynomial: $ax^3 + bx^2 + cx + d$.

In the polynomial $5x^{3} - 3x^{2} + 11x - 4$,the coefficient of $x^{2}$ is......

Which of the following expressions is a polynomial? State the reason. If an expression is a polynomial,state whether it is a polynomial in one variable or not: $3x^2 + 5x - 7 + \frac{8}{x}$