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AVprozaik [17]
2 years ago
13

4x - 2y = 5 y= 2x + 10

Mathematics
1 answer:
Helga [31]2 years ago
7 0

Answer:

There is no solution

Step-by-step explanation:

4x - 2y = 5 --> 4x - 2(2x + 10) = 5

4x - 4x  - 20 = 5

4x - 4x -25 = 0

Final answer is -25 = 0 and so therefor it is no solution

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The angle of depression from the top of a lighthouse to a boat is 27*. if the direct distance from the top of lighthouse to the
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Answer:

Correct answer:  Db = 411 .18 ft

Step-by-step explanation:

Given:

α = 27°  angle of depression

Dt = 462 ft  distance from the top of lighthouse to the boat

Db = ?   distance from the base of the lighthouse to the boat

Here we have a right triangle with hypotenuse Dt and one leg Db.

By definition

cos α = Db / Dt  ⇒ Db = Dt · cos α

Db = 462 · cos 27° = 462 · 0.89 = 411 .18 ft

Db = 411 .18 ft

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