7.7 Prior Knowledge

What is a variable?

• a term that includes a variable

• a letter that stands for an unknown number

• a term that is a known number without variables

What does the letter x stand for?

• a letter

• an unknown number

Which operation is represented by 2x?

• addition

• subtraction

• multiplication

• division

Anything raised to the zero power (except zero) is equal to what?

Find the equivalent expression.

9 x 9 x 9 x 9 x 9

• 9⁵
• 9¹⁵
• 9 x 5
• 9 + 9 + 9 + 9+ 9

2⁵ is the same as 2 x 5.

• True

• False

What does the term"cubed" mean?

• raised to the power of 2

• raised to the power of 3

• raised to the power of 4

What does the term "squared" mean?

• raised to the power of 3

• raised to the power of 4

• raised to the power of 2

5² , in this example 2 is the _____________

• base
• exponent

Write each product using an exponent. 
4 x 4 x 4 x 4 x 4 

• 4⁵
• 5⁴
• 4⁶
• 4⁶