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rewona [7]
2 years ago
5

Find the value of x round to the nearest 10th

Mathematics
1 answer:
Solnce55 [7]2 years ago
7 0

Answer:

  x ≈ 12.9

Step-by-step explanation:

In relation to the angle in this right triangle, the sides marked are the adjacent side and the hypotenuse. The relevant trig relation is ...

  Cos = Adjacent/Hypotenuse

  cos(72°) = 4/x

Multiplying by x/cos(72°), we have ...

  x = 4/cos(72°)

  x ≈ 12.9

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Answer:

"number line with open circles on negative 9 and 5, shading going in the opposite directions."

Step-by-step explanation:

Your inequality doesn't include an equal sign so there will be no closed holes. It will only be open holes.

|u|>14 means that the number u has to be greater than 14 or less than -14.  These numbers I describe just now all have a distance greater than 14 from 0.

So |u|>14 implies u>14 or u<-14.

But we are solving |2x+4|>14 so this implies we have 2x+4>14 or 2x+4<-14.

2x+4>14

Subtract 4 on both sides:

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Divide both sides by 2:

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Subtract 4 on both sides:

2x    <-18

Divide both sides by 2:

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So our solution is x>5 or x<-9.

Graphing!

~~~~~~~O                                         O~~~~~~~~

-----------(-9)---------------------------------(5)---------------

So we shaded to the right of 5 because our inequality says x is bigger than 5.

We shaded to the left of -9 because our inequality says x is less than -9.

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What is two and three fifths plus one and one eighth?
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