Chapter 1

Write an algebraic expression to represent the number of pens that can be bought with 30 cents if each pen costs c cents.

• 30 – c

• 30/c

• 30 + c

• 30c

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• {2, 4}

• {6, 8, 10, 12}

• {8, 10, 12}

• {2, 4, 6}

The equation 4 + 9 = 4 + 9 is an example of which property of equality? (Lesson 1-3)

• Substitution

• Reflexive

• Symmetric

• Transitive

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• 
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7(2x + y) + 6(x + 5y).

• 20x + 37y

• 20x + 6y

• 13x + 42y

• 15x + 6y

If x is a multiple of 2, then x is divisible by 4.

Identify the hypothesis of the statement.

• x is a multiple of 2

• x = 2

• x is divisible by 4

• x = 4

If x is a multiple of 2, then x is divisible by 4.

Which number is a counterexample for the statement?

• 20

• 4

• 32

• 10

The distance an airplane travels increases as the duration of the flight increases.

Identify the dependent variable.

• time

• direction

• airplane

• distance

Omari drives a car that gets 18 miles per gallon of gasoline. The car’s gasoline tank holds 15 gallons. The distance Omari drives before refueling is a function of the number of gallons of gasoline in the tank. Identify a reasonable domain for this situation.

• 0 to 18 miles

• 0 to 15 gallons

• 0 to 270 miles

• 0 to 60 mph