Question

writing an expression

a submarine was 144 feet below sea level. a shark was hovering at a constant depth above the submarine. the submarines depth was twice the depth of the shark.

which integer expression describes the position of the shark in relation to sea level?

-144 * 2
-144 / 2
2 * (-144)
144 / 2

Explanation:

Represent the submarine's position

Using the Writing Expressions knowledge point

$$ \text{Submarine Position} = -144 $$

Relate the submarine and shark depths

Using the Writing Expressions knowledge point

$$ \text{Submarine Depth} = 2 \times \text{Shark Depth} $$

Express the shark's position

Using the Writing Expressions knowledge point

$$ \text{Shark Position} = \frac{\text{Submarine Position}}{2} = -144 \div 2 $$

Answer:

• (A) \(-144 \div 2\)
• (B) \(-144 \div 2\) (Correct answer)
• (C) \(2(-144)\)
• (D) \(144 \div 2\)