Math Review with Expressions and Equations

The temperature was -5^°C on Monday and dropped overnight by 4^°C. What was the temperature on Tuesday morning?

• -1^°C

• 9^°C

• -9^°C

• 4^°C

Values for the variables, A, B, and C are graphed on the number line shown. Choose all the true statements below.

• A+B is a negative number.

• B+C is equal to zero.

• A+C is a positive number.

• A-B is a negative number.

Select all equivalent values

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Choose all the expressions equivalent to 3(2x+1)

• 6x+3

• 3(1+2x)

• 3(2x)+1

• 2x+1+2x+1+2x+1

Marco has $35 and earns $10 for each car he washes. Marco wants to buy a concert ticket that costs $75. What is the minimum number of cars Marco needs to wash to be able to buy the concert ticket?

• 6 cars

• 5 cars

• 4 cars

• 3 cars

Ceclia goes into a candy store with $4.00. She buys 9 jolly ranchers for $0.15 each and some chocolates. Each chocolate costs $0.25. What is the maximum number of chocolates Ceclia can buy?

• 16 chocolates

• 15 chocolates

• 11 chocolates

• 10 chocolates

Which is the solution of the inequality 2x-4≥-6?

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Jenna has $235 in savings. She is able to save $25 per week. If she wants at least $400 in her savings. If w is the number of weeks, express this situation in an inequality.

• 235w+25<400

• 235w+25>400

• 235+25w≥400

• 235+25w≤400

An inverse operation is

• reversing the sign in an inequality
• using the opposite operation to solve equations
•  A number’s distance from zero

One difference between equations and expressions would be...

• you solve both of them using inverse operations.
• you flip the symbol when you multiply or divide by a negative
• equations have an equals because they show two equal expressions. Expresions have terms and operations.