Class 6A - Chapter 3 - Lesson 1

Which problem situation matches the equation x - 5.83 = 3.17?

• Tyler ran 3.17 kilometers. His friend ran the same distance 5.83 seconds faster than Tyler. What is x, the time in seconds that Tyler ran?

• Lynn and Heather measured the length of worms in science class. Lynn’s worm was 5.83 centimeters long, and Heather’s worm was 3.17 centimeters long. What is x, the average length of the worms?

• Keisha’s lunch cost $5.83. She received $3.17 in change when she paid the bill. What is x, the amount of money she gave the cashier?

• Mr. Carlos paid $3.17 for a notebook that originally cost $5.83. What is x, the amount of money that Mr. Carlos saved?

Which problem situation matches the equation 4y = 6.76?

• Mrs. Thomas bought 4 gallons of gas. Her total cost was $6.76. What is y, the cost of one gallon of gas?

• Jordan bought 4 CDs that were on sale for $6.76 each. What is y, the total cost of the CDs?

• The width of a rectangle is 4 meters. The length is 6.76 meters more than the width. What is y, the length of the rectangle?

• The average yearly rainfall is 6.76 inches. What is y, the amount of rainfall you might expect in 4 years?

Which problem situation matches the equation x - 15 = 46?

• The original price of a jacket is $46. The sale price is $15 less. What is x, the sale price of the jacket?

• Mark had several baseball cards. He sold 15 of the cards and had 46 left. What is x, the amount of cards Mark had to start with?

• Sonja scored 46 points in last week’s basketball game. Talisa scored 15 points less. What is x, the amount of points Talisa scored?

• Katie earned $15 baby-sitting this week. Last week she earned $46. What is x, her average earnings for the two weeks?

Asha had some change in her purse. After her brother gave her $0.79, Asha had $2.24 altogether. Which equation can she use to find the original amount of money m she had in her purse?

• 2.24 = m - 0.79

• m = 2.24 × 0.79

• m + 0.79 = 2.24

• m + 2.24 = 0.79

Which algebraic equation best describes the total distance D traveled in miles after a 6-hour period, if r represents the rate of travel in miles per hour?

• D = 6 + r

• D = r/6

• D = 6r

• D = 6/r

A giraffe is 3.5 meters taller than a camel. If a giraffe is 5.5 meters tall, how tall is a camel?

Write the phrase "The sum of a number P and four is equal to 8." as an algebraic expression.

Write phrase "the product of a number M and 12"as an algebraic expression.

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