Expressions Real World

It costs $125 to set up service for a smart phone and $40 additional per month. If m = the number of months, how much would it cost for someone for m months of cell service?

• 25 + 40m

• 40 + 125m

• 40m

• 125 + 40m

Seth has $365 in his savings account and spends $32 per week. How much would he have in his savings account after w weeks?

• 365 - 32w

• 32w - 365

• 365 + 32w

• 32w + 365

Jonathan has $450 in his savings account and plans to add $20 per week. If w = the number of weeks, how much money would he have after w weeks?

• 20w - 450

• 450 + 20w

• 20w

• 450 + w

Allison sold 12 more boxes of cookies for the fundraiser than Emily. If e = the number of boxes Emily sold, how many did Allison sell?

• 12e

• e - 12

• 12/e

• e + 12

Mrs. Guang purchased four airline tickets to Florida. She will also pay a fee of $55 for an extra piece of luggage. Define a variable and write an expression to represent her total cost of flying to Florida.

• l = (pieces of) luggage

• 4l + 55

• 55t + 4

• t = (number of) tickets

• 4t + 55

• 55l + 4

Justin is purchasing a new iPhone. The sales clerk says that if he pays $100 now his monthly payments will be $25. Which expression can be used to determine how much Justin will pay for the phone?

• 25x + 100

• 25x - 100

• 600 - 100x

• 600 + 25x

A plumber charges $50 to visit a house plus $40 for every hour of work. Define a variable and write an expression to represent the total cost of hiring a plumber.

​ (a)   ​ (b)  

• h = hours (of work)

• 40h + 50

• 50v + 40

• 50h + 40

• 40v + 50

• v = visits

Mrs. Guang purchased four airline tickets to Florida. She will also pay a fee of $55 for an extra piece of luggage. Define a variable and write an expression to represent her total cost of flying to Florida.

• l = (pieces of) luggage

• 4l + 55

• 55t + 4

• t = (number of) tickets

• 4t + 55

• 55l + 4

A cell phone company charges $3.00 to make a phone call plus $0.15 for each minute for each minute you talk. Which equation would you use to determine the total cost, c, of a phone call that is m number of minutes long?

• c = 3.00 - 0.15m

• c = 0.15 + 3.00m

• 3.00 = c + 0.15

• c = 3.00 + 0.15m

Mr. DiMola's son, Shane, just turned 1 year of age. Mr. DiMola wanted to bake a cake for him. However, the recipe requires eggs, which he had none. So he went to the supermarket. Each carton contains 12 eggs. Let e represent the number of eggs. Write an expression Mr. DiMola could use to determine the total number of eggs when purchasing multiple cartons.

• 12e

• 18e

• 12 - e

• 12 + e