Unit 7, Lesson 1
Positive and Negative Numbers
Accelerated 6
Practice
Problem 1
- A fish is 12 meters below the surface of the ocean. What is its elevation?
- A sea bird is 28 meters above the surface of the ocean. What is its elevation?
- If the bird is directly above the fish, how far apart are they?
Problem 2
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A whale is at the surface of the ocean to breathe. What is the whale’s elevation?
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The whale swims down 300 feet to feed. What is the whale’s elevation now?
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The whale swims down 150 more feet. What is the whale’s elevation now?
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Plot each of the three elevations as a point on a vertical number line. Label each point with its numeric value.
Problem 3
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Represent each of these temperatures in degrees Fahrenheit with a positive or negative number.
- 5 degrees above zero
- 3 degrees below zero
- 6 degrees above zero
- \(2\frac34\) degrees below zero
- Order these temperatures from the coldest to the warmest.
Problem 4
It was \(\text- 5 ^\circ \text{C}\) in Copenhagen and \(\text- 12 ^\circ \text{C}\) in Oslo. Which city was colder?
Problem 5
Han wants to buy a \$30 ticket to a game, but the pre-order tickets are sold out. He knows there will be more tickets sold on the day of the game, with a markup of 200%. How much should Han expect to pay for the ticket if he buys it the day of the game?
A rectangle has an area of 24 square units and a side length of \(2\frac34\) units. Find the other side length of the rectangle. Show your reasoning.