Grade 7 | Unit 5 | Lesson 16: Representing Contexts with Equations | Practice Problems

A whale was diving at a rate of 2 meters per second. How long will it take for the whale to get from the surface of the ocean to an elevation of -12 meters at that rate? Match each situation to one of the equations.

A swimmer dove below the surface of the ocean. After 2 minutes, she was 12 meters below the surface. At what rate was she diving? Match each situation to one of the equations.

The temperature was -12 degrees Celsius and rose to 2 degrees Celsius. What was the change in temperature? Match each situation to one of the equations.

The temperature was 2 degrees Celsius and fell to -12 degrees Celsius. What was the change in temperature? Match each situation to one of the equations.

Starting at noon, the temperature dropped steadily at a rate of 0.8 degrees Celsius every hour. How many hours did it take for the temperature to decrease by 4.4 degrees Celsius? Write and solve an equation and describe what your variable represents.

If the temperature after the 4.4 degree drop was -2.5 degrees Celsius, what was the temperature at noon? Write and solve an equation and describe what your variable represents.