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klio [65]
3 years ago
13

Write a compound inequality to represent the following verbal expression:

Mathematics
1 answer:
EastWind [94]3 years ago
7 0

Answer:

21≤X<28

Or

X≥21+X<28

Step-by-step explanation:

Both equations mean the same thing

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I am not quite sure what the question asks for,
But this is what i assume it wants:

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In this given one, we basically find the size of the angle A
we do cosine inverse on both sides to get the size of the angle A
cos^{-1} : It looks like this in the calculator
cos^{-1} × cos A=cos^{-1}(0.6489)
(cos^{-1} and cos cancels out)
A=cos^{-1}(0.6489)
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check: 
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