Simplifying Expressions

Select the answer choices that represent an expression

• 10x+4=8

• 4c-2

• 10+4x+7y

• 2y+8y=8

• z+1=3z

What is the difference between an equation and an expression?

• An expression has numbers and an equation does not.

• An equation has variables and an expression does not.

• An equation has an equal sign an expression does not.

• An expression has terms and an equation does not.

Are the following terms like or unlike?

 $-15x$  and  $-15$  

• Like

• Unlike

 Are the following terms like or unlike?

 $\frac{1}{4}c$ and  $-9c$  

• Like

• Unlike

 Are the following terms like or unlike?

 $6y$ and  $6x$  

• Like

• Unlike

 Are the following terms like or unlike?

 $30$ and  $-25$  

• Like

• Unlike

Simplify:6b + 7b - 10

• 3b
• 13b - 10
• 13b² - 10
• 3b²

What is the simplified form of this expression
3x+4+5x+3

• 15x
• 8x+7
• 7x+8

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

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

4a + 9 + a

• 5a + 9
• 14a
• 3a + 9
• 5a - 9