Solve Algebraic Expression by Plugging in a Value

Evaluate Algebraic Expressions

Objective: Evaluate algebraic expression using substitution and following the order of operations.

​EXPRESSION

​EQUATION

​7 + x

​7 + x = 10

​The variable can be any real number

​The variable is a specific number(s)

Evaluate an Expression: plug in a number for the variable(s) and do the math.

Evaluate: (4n + 6) - 4 for n = 3
Expand:
Plug in:

EXAMPLE

Evaluate: 4(6n - 10) + 5 for n = 3
Expand:
Plug in:

Multiple Choice

3b x 2b

• 5b

• 6b

• 6b²

• 5b²

Multiple Choice

7a + 5b - 2a - 4b

• 9a + b

• 5a + b

• 11a + 5b

• -9a - 9b

Multiple Choice

Which is NOT a word phrase for the algebraic expression.
n + 16

• a number increased by 16
• 16 increased by a number
• the sum of a number and 16
• 16 more than a number

Multiple Choice

Which is NOT a word phrase for the algebraic expression.
24n

• 24 times a number
• 24 times n
• the product of 24 and a number
• the sum of 24 and a number

Multiple Choice

Write an algebraic expression for the word phrase.
12 more than (m) machines

• 12-m
• m-12
• 12+m
• m+12

Multiple Choice

Write an algebraic expression for the word phrase.
six times the daily amount of fiber (f) in your diet

• 6f
• 6+f
• 6/f
• 6-f

Multiple Choice

Combine the like terms. Simplify.
2x + x - 4y

• 2x+x-4y
• 4x+4y
• 3x-4y
• 3x+4y

Multiple Choice

Combine like terms. Simplify.
3n – 6mn + 2n

• 3n-6mn
• 5n-6mn
• 5n+6mn
• n-6mn

Multiple Choice

Combine like terms. Simplify.
3n – 6mn + 2n

• 3n-6mn
• 5n-6mn
• 5n+6mn
• n-6mn