Unit 2A Review

Vocabulary

100

Addition, Subtraction, Multiplication, Division

Operations

200

A number that doesn't change.

Constant

300

A letter that represents an unknown number.

Variable

400

A number that is multiplied by a variable in a term. It is typically in front of the variable. 

Coefficient

500

A number, variable, or a combination of the two. Separated by addition or subtraction.

Term

Like Terms

100

Provide a like term to 2x

3x

200

Provide a like term to 3y

5y

300

Provide a like term to 6xy

8xy

400

Provide a like term to 4x²

12x²

500

Provide a like term to 7x³y

9x³y

Distributive Property

100

3(x + 4)

3x + 12

200

5(x - 2)

5x - 10 

300

-2(x + 7)

-2x - 14

400

4(2x - 5)

8x - 20

500

-3(3x + 4)

-9x - 12

Simplifying Expressions

100

x + 3x

4x

200

3x + 7 - x + 2

2x + 9 

300

4(x + 2) - x

3x + 8 

400

2(3x - 5) + 4 - x

5x - 6

500

-2(4x - 3) + 3(x + 1) - 5

-5x + 4

Solving Equations

100

x + 5 = 12

x = 7

200

x - 4 = 9

x = 13

300

3x = 18

x = 6

400

-2x = 10

x = -5

500

x / 4 = -6

x = -24