Respuesta :
Answer:
d.3(–25) – (–10)
Step-by-step explanation:
The seal dove 25 feet below sea level. When referring to his position in relation to sea level, this is the integer -25.
The sea lion dove 10 feet less than 3 times as deep as this. 3 times as deep as the seal would be 3(-25).
Diving 10 feet less than this below sea level would be subtracting -10; this is because diving below sea level makes the ten negative, and since it's 10 feet less than the seal it's subtraction. This gives us
3(-25)-(-10)