Separate monomials, binomials, trinomials and multinomial from the following algebraic expressions:

8 - 3x, xy², 3y² - 5y + 8, 9x - 3x² + 15x³ - 7, 3x x 5y, 3x ÷ 5y, 2y ÷ 7 + 3x - 7 and 4 - ax² + bx + y

Write the degree of each polynomial given below:

(i) xy + 7z

(ii) x² - 6x³ + 8

(iii) y - 6y² + 5y⁸

(iv) xyz - 3

(v) xy + yz² - zx³

(vi) x⁵y⁷ - 8x³y⁸ + 10x⁴y⁴z⁴

Write the coefficient of:

7a in 7abx

Write the coefficient of:

5x² in 5x² - 5x