lesson 15-1 practice

Question

A submarine cruising level is at 175 meters below the sea's surface. If the submarine starts to dive down to deeper water at a rate of 12.5 meters per minute, which equation could be used to determine the submarine's depth in meters below the sea's surface, d, after x number of minutes of diving at this rate?

A d = 14x

B d= 175 - 12.5x

C d = x(175 - 12.5)

D d = -12.5x - 175

Answer 1

D

-12.5x tells us it goes deeper a the rate of 12.5 m/min

and it started at depth 175 m: -175m