Variables and Expressions

An algebraic expression must have a number (constant), a variable, and an ________________.

• letter
• solution
• operation
• equal sign

In this expression what is the variable? 
5 + y 

• q
• +
• 5
• y

A variable represents what is ______________. 

• the answer
• the operation
• the difference
• unknown 

The number or constant in this is expression is ____ ? 
6 + n 

• n
• +
• 6
• =

Evaluate the expression if a=3 and b=4.
ab ÷ 3

• 11
• 4
• 3
• 1

Evaluate the expression if a=3 and b=4.
2a + 8

• 31
• 14
• 16
• 12

A variable is . . .

• an awesome number

• a number represented by a letter

• an infinite number

• a number multiplied by another number

A constant is . . .

• a letter

• a math or science mystery

• a number

• a variable

Evaluate the expression when x = 10

(x + 2) ÷ 6

• 4

• 10

• 5.66

• 2

Evaluate the expression when s = 3

3 + s ⋅ 2

• 12

• 9

• 11

• 53