Getting Ready for Unit 3

What is a ratio?

• A comparison of two quantities
• A comparison of two numbers 
• A way to compare two quantities using division 
• All of the above are definitions of a ratio

Janese can complete 7 toe touches in 10 seconds. Which of the following represents a ratio of Janese's toe touches to seconds? 

• 7:10
• 7 to 10
• 7/10
• All of the above

If the following table were complete, what number of toe touches would go with 30 seconds? (using the same ratio: 7 toe touches in 10 seconds)

• 7
• 28
• 21
• 49

What is an algebraic expression?

• An equation with a variable
• An expression that contains one or more variables
• A combination of numbers and operators
• 2 equations

Which algebraic expression represents the following statement?
The cost of each ticket, if x tickets cost $106.25

• 106.25x
• x + 106.25
• 106.25 - x
• 106.25/x

Which algebraic expression represents the following statement?
The cost of g gallons of gas if each gallon costs $3.67

• 3.67g
• 3.67g²
• 3.67/g
• 3.67 + g 

Write an algebraic expression for the following statement:
Five less than 3 times a number

• 3n + 10
• 5 - 3n
• 3n - 5
• 3n/5

Solve the following equation (for x)
2x + 5 = 8

• x = 6.5
• x = 1.5
• x = 1
• x = 3

16 + 3x = 28

• x = 4
• x = 8
• x = -4
• x = 10

What is 25% in decimal form? 

• 25.0
• 2.5
• 0.25
• 0.025