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3 years ago

Three is added to a number, and then the sum is multiplied by 4. The result is 16. Find the number.

2 answers:

7 0

$x-\ number\\\\
4(3+x)=16\\
12+4x=16\ \ \ |Subtract\ 12\\
4x=16-12\\
4x=4\ \ \ |Divide\ by\ 4\\
x=1\\\\ \textbf{Number\ is\ equal\ to\ 1.}$

miskamm [114]3 years ago

4 0

(3+x)*4=16
Distributive property
12+4x=16
-12 -12
4x-4

x=1

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3 years ago

A ship's sonar locates a treasure chest at a 12° angle of depression. A diver is lowered 40 meters to the ocean floor. How far (

anastassius [24]

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The answer to your question is 8.5 m

Step-by-step explanation:

Data

angle = Ф = 12°

dept = 40 m

distance from the ship to the treasure = ?

Process

To solve this problem use trigonometric functions. The trigonometric function that relates the Opposite side and the adjacent side is tangent.

tan Ф = Opposite side / Adjacent side

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Opposite side = Adjacent side x tanФ

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