Answer:
feet : Shark is 72 feet below sea level.
Step-by-step explanation:
Let x represent depth of the shark.
We have been given that the submarine’s depth was twice the depth of the shark. This means that depth of submarine would be
.
We have been given that a submarine was 144 feet below sea level, so submarine's elevation would be
.We can represent this information in an equation as:

To find shark's position, we need to solve for x.


Therefore,
feet represents shark's elevation, which represents that shark is 72 feet below sea level.
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Answer:
115x-12x
Step-by-step explanation:
3(9-X) x 4+7
12(9-X)+7
108-12x +7
115-12x
Answer:
67
Step-by-step explanation:
4x+3+15x-8=90(complementary angle)
x=5
now D = 15*5-8
d=67