The video covers lessons 20-22, focusing on combining like terms and understanding properties such as associative, distributive, and commutative. It includes examples, practice problems, and error analysis to reinforce learning. The video concludes with final practice problems and a summary of key concepts.

What property is demonstrated when the grouping of numbers in addition does not affect the sum?

• Distributive Property

• Associative Property

• Commutative Property

• Identity Property

Which property allows you to multiply a sum by multiplying each addend separately and then add the products?

• Associative Property

• Distributive Property

• Commutative Property

• Identity Property

What is the simplified form of the expression 6x + 4x?

• 12x

• 2x

• 0x

• 10x

What is the result of applying the distributive property to 3(x + 4)?

• 12x + 3

• 3x + 4x

• 3x + 12

• 3x + 4

How can subtraction be rewritten to utilize the commutative property?

• As multiplying by zero

• As adding a negative

• As dividing by one

• As adding a positive

Which property allows the rearrangement of terms in an expression without changing the result?

• Commutative Property

• Associative Property

• Distributive Property

• Identity Property

What is the result of combining like terms in the expression 7a + 5b - 3a + 4b?

• 4a + 1b

• 10a + 1b

• 4a + 9b

• 10a + 9b

How can you verify if two expressions are equivalent?

• By comparing their constants

• By ensuring they have the same coefficients

• By simplifying both expressions to see if they match

• By checking if they have the same number of terms

Where should parentheses be placed in the expression 8 - 3(4 - 9x) to maintain equivalence?

• Around the entire expression

• Around 8 - 3

• Around 4 - 9x

• Around 3(4 - 9x)

What is the result of simplifying the expression 8x - 9 - 12x + 5?

• -4x + 4

• -4x - 4

• 4x - 4

• 4x + 4