choose the expression that represents a cubic expression.
19x4 + 18x3 − 16x2 − 12x + 1
10x3 − 6x2 − 9x + 12
−9x2 − 3x + 4
4x + 3
choose the expression that represents a linear expression.
6x + 6
−6x2 + 8x − 9
8x3 + 9x2 − 10x + 11
7x4 − 8x3 + 9x2 − 10x + 11
choose the expression that represents a quadratic expression.
9x − 2
5x2 + 9x − 1
−2x3 + 8x2 − 7x + 1
x4 − 12x3 + 8x2 − 7x + 1
classify the expression: −2x2 + 11
quadratic expression
linear expression
cubic expression
exponential expression

10x³ - 6x² - 9x + 12 is a cubic expression ⇒ 2nd

6x + 6 is a linear expression ⇒ 1st

5x² + 9x - 1 is a quadratic expression ⇒ 2nd

Quadratic expression ⇒ 1st

Step-by-step explanation:

* Lets explain the degree of any expression

- The degree of any expression is the greatest power of the variable

- Ex:

# 3x - 3 is a first degree expression

# x² - 3x + 2  is a second degree expression

# 5x³ - 2x² + 5x - 2 is a third degree expression

- The first degree expression is called linear expression

- The second degree expression is called quadratic expression

- The third degree expression is called cubic expression

* Lets solve the problem

∵ The cubic expression is the expression with greatest power of 3

∴ 10x³ - 6x² - 9x + 12 is the cubic expression

∵ The linear expression is the expression with greatest power of 1

∴ 6x + 6 is a linear expression

∵ The quadratic expression is the expression with greatest power of 2

∴ 5x² + 9x - 1 is a quadratic expression

∵ The expression is -2x² + 11

∵ The greatest power of x is 2

∴ -2x² + 11 is a quadratic expression

im not sure

step-by-step explanation:

7

step-by-step explanation:

the answer would be 7