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slavikrds [6]
3 years ago
12

Ill give 100 points to anyone who gets this correct and brainliest.

Mathematics
1 answer:
wariber [46]3 years ago
7 0

Answer:

2.5x7 = 17.5 but since it's dropping -17.5

Step-by-step explanation:

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I think it's b

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Will mark brainiest
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3+3+3+4+4+5+6+6+7+9+9=59
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Precalc.
viktelen [127]
Domain: x>0.

(\log_2x)^2+7\log_2x+12=0

Substitute t=\log_2x\in\mathbb{R}. We have:

 t^2+7t+12=0\\\\a=1\qquad b=7\qquad c=12\\\\\\\Delta=b^2-4ac=7^2-4\cdot1\cdot12=49-48=1\\\\\sqrt{\Delta}=\sqrt{1}=1\\\\\\
t_1=\dfrac{-b-\sqrt{\Delta}}{2a}=\dfrac{-7-1}{2}=\dfrac{-8}{2}=-4\\\\\\
t_2=\dfrac{-b+\sqrt{\Delta}}{2a}=\dfrac{-7+1}{2}=\dfrac{-6}{2}=-3

For t₁ there will be:

\log_2x=t_1\\\\\log_2x=-4\\\\2^{-4}=x\\\\x=\dfrac{1}{2^4}\\\\\\x=\dfrac{1}{16}=0,0625\\\\\\\boxed{x\approx0,063}

and for t₂:

\log_2x=t_2\\\\\log_2x=-3\\\\2^{-3}=x\\\\x=\dfrac{1}{2^3}\\\\\\x=\dfrac{1}{8}\\\\\\\boxed{x=0,125}

Answer d)


6 0
3 years ago
What is the measure of an angle that turns through 3/4 of a complete circle
ANEK [815]
270 degrees this because when you count each angle it is 90 degrees then 180 degrees then 270 
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3 years ago
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