Simplify Algebra Expression Addition and Subtraction

4a + 9 + a

• 5a + 9
• 14a
• 3a + 9
• 5a - 9

Simplify the Expression. 
9z  - 21 - 3z + 10

• Simplified
• 9z - 21 - 7
• 9z - 11 -3z
• 6z - 11

4x+2x+3x

• 10x

• 9x

• 11x

• 8x

7 x 3x

• 20x

• 10x

• 73x

• 21x

6x+2x

• 12x

• 8x

• 6x

• 2x

w + w + w could be simplified as?

• 3w
• 3
• w
• 0

Work out the value of the expression when x = 3, y = – 2 and z = – 4.
2xz

• 1
• 24
• -24
• 9

z + 1

• one more than z

• one less than z

• half of z

• 1 times z

Write the expression.
Twelve fewer questions than were on the first test. 

• 12 + q
• q - 12
• q x 12
• q ÷ 12

Write the expression.
Three more cookies than are in the jar. 

• C x 3
• C - 3
• C + 3
• C ÷ 3