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  1. Write expressions to represent the quantities described below. Homework Help ✎

    1. If Thompson Valley High School has x students and if Erwin Middle School has 342 fewer students, how many students does Erwin Middle School have?

    2. If w represents the width of a rectangle and if its length is twice its width, how long is the rectangle?

    3. When Mr. Van Exel bought his laptop, he paid $400 more than three times the amount he paid for his camera. If he paid c dollars for his camera, then how much did he pay for his laptop?

x − 342

Follow the steps in part (a).

length = 2w

Identify the important information in the word problem.

Follow the steps in part (a).

cost of the laptop = 3(c) + 400