simplifying/evaluating/solving

Simplify the Expression: 2x + 3x - 12x

• 7x
• -7x
• -17x
• 17x

Simplify the Expression: 21 - 8x - 4 + 9x

• -4x -17
• 17x + 25
• x + 17
• 17x + 17

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

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

Simplify the expression: 7v + 2 + 12 + 2v

• 23
• 23v
• 9 + 14v
• 9v + 14

What is 6+x when x=53?

• 59
• 50
• 47
• 90642

what is x•x when x=16

• 256
• 32
• 1
• 16

• 0

• -1

• 100

• 1

• 42

• 24

• 34

• 52

• 1

• 2

• 3

• 4

Evaluate the expression.   Let g = 3    h = 9 
4h + 2g + 4

• 42
• 46
• 34
• 58