Question

a seal went 25 feet below sea level to catch a fish. a sea lion dove 10 feet less than three times as deep as the seal to catch a larger fish. which expression represents the sea lion’s position in relation to sea level?
○ $3(25) - 10$
○ $25 - 3(10)$
○ $3(-25) - 10$
○ $3(-25) - (-10)$

Explanation:

Step1: Represent seal's position

Below sea level is negative, so seal's position is $-25$ feet.

Step2: Analyze sea lion's depth

Three times as deep as seal: $3\times(-25)$. Then 10 feet less: $3(-25)-10$.

Answer:

$3(-25) - 10$ (corresponding to the third option: 3(-25) – 10)