Lesson: Evaluate Algebraic Expressions

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Evaluate Algebraic Expressions

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

Multiple Select

Which of the following are algebraic expressions?

• $$12-4b$$

• $$13\left(2x+99\right)-1$$

• $$\frac{1}{2}+\frac{1}{9}$$

• $$4x+29=122$$

• $$35=40-5$$

​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:

Math Response

Evaluate: 10 - (3h + 2) for h = 3

Type answer here

Correct Answer: -1

Deg^°

Rad

EXAMPLE

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

Math Response

Evaluate: 12 + 7(-2h - 3) for h = -3

Type answer here

Correct Answer: 33

Deg^°

Rad

EXAMPLE

Evaluate 2x² + 3x for x = 8
Expand:
Plug in:

Math Response

Evaluate: 3x² - 10x + 3 for x = -4

Type answer here

Correct Answer: 91

Deg^°

Rad

EXAMPLE

Math Response

Evaluate:  $$\frac{30-y}{2x}-4$$   for x = -7 and y = 2

Type answer here

Correct Answer: -6

Deg^°

Rad