Algebraic Expressions and Operations

Mrs. Lopez introduces module three, focusing on equation solving. Key vocabulary such as terms, variables, and expressions are explained. The video covers combining like terms, properties of addition, and multiplication, with examples to illustrate these concepts.

What is a term in an expression?

• Each summand of an expression separated by a plus sign

• A symbol that represents a number

• A number that is always negative

• A number that is always positive

Which of the following is an equivalent expression to 4 + 5?

• 3 + 6

• 2 + 7

• 6 + 3

• 5 + 4

What is a constant in an expression?

• A number that changes with variables

• A symbol that is always positive

• A number that does not have a variable

• A variable that represents a number

Which of the following are like terms?

• 3x and 2y

• 4x and 4

• 5y and 5x

• 2x and 3x

When can you combine terms in an expression?

• When they are separated by a minus sign

• When they have different variables

• When they are like terms

• When they are constants

What does the property of any order in addition mean?

• The sum is always zero

• You can only add like terms

• The order of addition does not affect the sum

• You can only add numbers in a specific order

How is the product of 2x and 3 represented?

• 5x

• 3x + 2

• 6x

• 2x + 3

What is the result of multiplying 5x by 2?

• 7x

• 10x

• 5x + 2

• 2x + 5

What happens when you multiply a negative x by negative 9?

• The result is positive 9x

• The result is negative 9x

• The result is negative x

• The result is zero

Which expression is equivalent to 3x + 4y?

• 3 times 4 plus x plus y

• 12xy

• 3x plus 4y

• 7xy