Simplifying Monomial Expressions

Which is equivalent to the following expression?

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• 
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Simplify:
5x - 6x - 8x + 7 

• -9x + 7

• -9x -  7

• 9x + 7 

• 9x - 7

Which one is the variable?
3w + 2w - (-7w)

• 3

• 2

• w

• 12

Simplify:
-1x + y - z + 10z + 2x - 10y

• 1x - 9y + 9z

• 1x - 9z - 9y

• -1x - 9z - 9y

• -1x - 9 - 9y

Classify by number of terms:
12

• Monomial

• Binomial

• Trinomial

• 4-Term Polynomial

one-term polynomial

• monomial

• binomial

• trinomial

• polynomial

Simplify the expression.
(4a³ - 8a - 4a²) + (7a³ - 7 - 6a)

• 11a³ - 4a² - 14a - 7 

• 5a³ - 4a² - 14a - 7 

• 5a³ - 4a² - 20a - 7 

• 5a³ - 9a² - 20a - 7

Classify by number of terms:
9x

• Monomial

• Binomial

• Trinomial

• 4-Term Polynomial

3x²+5x²

• 8x

• 2x²

• 8x²

• 2x