Creating Expressions Review

Joseph tweets 13 times a day. Define each variable and write an algebraic expression to describe the number of posts after any given number of days.

London has 745 pictures on her phone. Her memory is getting full, so she starts deleting 20 pictures every day. Define each variable and write an algebraic expression to describe the number of pictures left on her phone after any given number of days.

Jason posts 17 status updates on Tiktok each day. Taylor posts 21 status updates on Tiktok each day. Define each variable and write an algebraic expression to describe the combined number of posts for Jason and Taylor.

Jaliyah and Derrick plan to buy one computer for $499.00 strictly for gaming purposes. Games cost $49.99 each. Define each variable and write an algebraic expression to describe how much they will spend before sales tax, based on purchasing the computer and the number of games.

Willie and Cameron purchase two movie tickets. A movie ticket costs $6.50, a drink costs $5.50, and a bag of popcorn costs $6.00. Define each variable and write an algebraic expression to describe how much they spend based on the number of drinks and bags of popcorn they buy. Identify the parts of the expression by underlining the coefficient(s), circling the constant(s), and drawing a box around the variable(s).

An airplane is flying at 35,000 feet above sea level. The airplane starts to descend at a rate of 2,500 feet per minute. Let m be the number of minutes. Which of the following expressions describe the height of the airplane after any given number of minutes?

• 2,500 - 35,000m

• 2,500 + 35,000m

• 35,000 - 2,500m

• 35,000 + 2,500m

A clothing store is having a sale in which all T-shirts are $10. The sales tax is 7%. If Omarion buys n T-shirts during his sale, the total cost of his purchase will be

10n + 0.07(10n). Interpret the meaning of 0.07(10n) in this context.

• The expression 0.07(10n) represents the price of each T-shirt.

• The expression 0.07(10n) represents the cost of Omarion's purchase before tax.

• The expression 0.07(10n) represents the total tax on Omarion's purchase.

• The expression 0.07(10n) represents the total cost of Omarion's purchase.