Simplify and Evaluate Expressions

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

3x - 5x

• 2x
• 8x
• -2x
• 15x²

Simplify the expression: 3x + 2x

• 5x
• x
• 6x
• 5

-r -10r

• 11r
• -11r
• 9r
• -11

Simplify the following expression:
a - 8 - 10

• 2a - 18
• a - 18
• a - 2
• a + 18

Simplify the following expression:
-9(14p - 8) - 4p

• 130p - 72
• 122p - 72
• -130p - 18
• -130p + 72

Simplify the expression: -5(x + 4)

• 5x + 4
• -5x + 4
• -5x - 20
• -5x + 20

x + 2x

• 2x²
• 3x
• Can't be simplified
• 3x + x

x ⋅ x

• 2x
• x²
• Neither
• x - x

x ⋅ 2x

• 3x
• 2x²
• Can't be simplified
• 4x