Combining Like Terms

How many terms does this expression have?
-18y + 7yz - 4z

• -18
• 3
• 7
• -4

Simplify: x + 3x + 6x + x

• 9x

• 11x

• 2x + 9x

• Can't be simplified

Simplify: 4q + 4t + 3q + t

• 12tq

• 3q + 4t

• 7q + 5t

• Can't be simplified

Simplify: 10w + 3d + 3w + d

• 13w + 4d

• 17wd

• 13w + 3d

• Can't be simplified

Simplify:
3(9 + 2d) + 4d 

• 18d+10d
• 18d-10d
• 27+10d
• 37d

Simplify the following expression:

9x + 5(x + 3)

• 9x + 15

• 45x + 27

• 14x + 42

• 14x + 15

Simplify the following expression:

2x + 3(x + 3)

• −5x + 9

• 5x + 9

• 5x + (−9)

• −5x +(−9)

Simplify:

-10x + 15 - 3x + 2

• 4x

• -13x² + 13

• -13x + 17

• -7x + 17

Simplify:
3(9 + 2d) + 4d 

• 18d+10d
• 18d-10d
• 27+10d
• 37d

Simplify:
4(8x + 1) - 6(1 - 8x)

• -80x - 2
• 80x + 2
• -80x + 2
• 80x - 2