Simplification of Algebraic Expressions

What are the variables of 7x+6y-9

• 6,7

• 9

• 6y, 7x

• x, y

Simplify the expression: (k⁴ – 3 – 3k³) + (–5k⁴ + 6k³ – 8k⁵).

• –8k⁵ – 4k⁴ + 3k³ – 3

• –8k⁵ + 4k⁴ – 3k³ + 3

• –8k⁵ – 4k⁴ – 3k³ + 3

• –8k⁵ + 4k⁴ + 3k³ – 3

Simplify the expression (a³ - 2a²) - (3a² - 4a³).

• 5a³ - 5a²

• a³ + 2a²

• 3a³ - 6a²

• 4a³ + a²

What is the result of (4 + 2n³) + (5n³ + 2)?

• 7n³ + 6

• 9n³ + 4

• 6n³ + 8

• 8n³ + 2

Simplify the expression (3a² + 1) - (4 + 2a²).

• a² - 3

• 2a² + 5

• 3a² - 4

• a² + 1

Simplify the expression (5a + 4) - (5a + 3).

• 1

• 0

• 2

• -1

What is the simplified form of (-x⁴ + 13x⁵ + 6x³) + (6x³ + 5x⁵ + 7x⁴)?

• 18x⁵ + 6x⁴ + 12x³

• 18x⁵ - 6x⁴ + 12x³

• 18x⁵ + 6x³ + 12x⁴

• 18x⁵ - 6x³ + 12x⁴

What is the result of simplifying the expression: (7 – 13x³ – 11x) – (2x³ + 8 – 4x⁵)?

• 4x⁵ – 15x³ – 11x – 1

• 5x⁵ – 15x³ – 11x + 1

• 4x⁵ + 15x³ + 11x + 1

• 3x⁵ – 15x³ – 11x – 1

What is the result of: (y³ – 7x⁴y⁴) + (–10x⁴y³ + 6y³ + 4x⁴y⁴) – (x⁴y³ + 6x⁴y⁴)?

• –9x⁴y⁴ – 11x⁴y³ + 7y³

• –9x⁴y⁴ + 11x⁴y³ – 7y³

• –9x⁴y⁴ + 11x⁴y³ + 7y³

• –9x⁴y⁴ – 11x⁴y³ – 7y³

Evaluate the expression using the values
 m = 7, r = 8, and t = 2.
4m + t

• 30

• 28

• 26

• 14