One Variable Expressions and Equations

What is an algebraic expression?

• a letter or a symbol used to represent an unknown value

• an expression that contains one or more variables and may also contain an operation symbol such as + or -

• a specific number whose values does not change

Which of the following expressions contains a variable?

• 7+3

• 144÷12

• 7 + 15n

• 6(5)

Which expression shows the sum of 12 and x?

• 12x

• 12-x

• 12+x

Which phrase describes this expression 16-y

• The quotient of 16 and y

• y added to 16

• the product of 16 and y

• y less than 16

The quotient of z and 20 is shown in which expression?

• z+20

• z/20

• 20z

The product of 7 and j increased by 3 is shown in which expression?

• 3+7j

• 7j-3

• 7(j+3)

• 3j+7

The product of m and 23 is shown in which expressions!!! CHECK ALL THAT APPLY!!!

• m⋅23

• 23+ m

• 23 x m (multiplication symbol)

• 23m

Evaluate 3x + 8   if x = 2

• 13
• 14
• 15
• 16

Evaluate when x = 8:
2x + x - 10

• 34
• 22
• 14
• 24

Evaluate the expression when x = 3. 
2x² - 5

• 31
• 12
• 7
• 13