9/28 Review

What do numerical expressions not have that algebraic expressions do?

• Operations

• Math

• Numbers

• Variables

What does the "5" represent in this expression:

5³

• Exponent

• Base

• Variable

What does the exponent tell you to do?

• Multiply the base by that number.

• Multiply the base by itself that number of times.

• Add the base by that number.

What is the first thing you should do before evaluating an algebraic expression?

• Solve using PEMDAS

• Rewrite the expression by putting in the invisible multiplication symbols.

• Substitute the quantitiess for the variables.

Evaluate the expression:

5a⁴b - 10 x a

a = 2

b = 4

• 140

• 620

• 300

Evaluate the expression:

3y²z³

^{y = 5}

^{z = 1}

• 225

• 75

• 495