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valentinak56 [21]
3 years ago
8

Solve 3 - x/2 ≥ 15.

Mathematics
2 answers:
ikadub [295]3 years ago
6 0

Answer:

A

Step-by-step explanation:

subract the three on both sides to get 12. then multiple by -2. when multiplying or dividing by negatives you want to flip the sign

adoni [48]3 years ago
6 0

Answer:

A. X ≤ -24

Step-by-step explanation:

(3 - X/2 ≥ 15)2

6 - X ≥ 30

-X ≥ 30-6

-X ≥ 24

-X/-1 ≤ 24/-1

X ≤ -24

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Rewrite the limand as

(1 - sin(<em>x</em>)) / cot²(<em>x</em>) = (1 - sin(<em>x</em>)) / (cos²(<em>x</em>) / sin²(<em>x</em>))

… = ((1 - sin(<em>x</em>)) sin²(<em>x</em>)) / cos²(<em>x</em>)

Recall the Pythagorean identity,

sin²(<em>x</em>) + cos²(<em>x</em>) = 1

Then

(1 - sin(<em>x</em>)) / cot²(<em>x</em>) = ((1 - sin(<em>x</em>)) sin²(<em>x</em>)) / (1 - sin²(<em>x</em>))

Factorize the denominator; it's a difference of squares, so

1 - sin²(<em>x</em>) = (1 - sin(<em>x</em>)) (1 + sin(<em>x</em>))

Cancel the common factor of 1 - sin(<em>x</em>) in the numerator and denominator:

(1 - sin(<em>x</em>)) / cot²(<em>x</em>) = sin²(<em>x</em>) / (1 + sin(<em>x</em>))

Now the limand is continuous at <em>x</em> = <em>π</em>/2, so

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