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Nadya [2.5K]
2 years ago
5

THE NUBER OF PEOPLE CONTACTED

Mathematics
1 answer:
Elis [28]2 years ago
4 0

Answer:

option c, x = 3

Step-by-step explanation:

Given:

  • f(x) = 27
  • f(x) = 3^{x}

Since both equal f(x) they must be equivalent as well,

3^{x} = 27\\

Apply exponent rule, 3 x 3 x 3 = 27

hence x = 3

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Find the exact value of tan( cos^-1 ( -5/13))
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Answer:

-¹²/₅  

Step-by-step explanation:

Let cos a = -⁵/₁₃

Then tan a = sin a/cos a

= [√(1 - cos²a)]/cos a

= {√[1 - (-⁵/₁₃)²]}/(-⁵/₁₃)

= -[√(1 - ²⁵/₁₆₉)] × ¹³/₅

= -[(√(¹⁴⁴/₁₆₉ )] × ¹³/₅

= -¹²/₁₃ × ¹³/₅

= -¹²/₅

tan(arccos (-⁵/₁₃)) = -¹²/₅

The diagram shows the 2nd  quadrant of a circle with radius 13, cos a = -⁵/₁₃, and tan a = ¹²/₍₋₅₎ = -¹²/₅.

4 0
3 years ago
What is 8z - 22 = 3(3z + 11) - z
Masja [62]
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or
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6 0
3 years ago
12 points<br> Add 1.5 x 10^7 to 2.7 x 10^9.
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Step-by-step explanation:

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3 years ago
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Step-by-step explanation: PLEASE GIVEBRAINLIEST IT HELPS ALOT

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