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2 years ago

What is the square root of –16? A. –8i B. –4i C. 4i D. 8i

Mathematics

2 answers:

hichkok12 [17]2 years ago

6 0

Answer:

C. 4i

Step-by-step explanation:

$\sqrt{-16} = \sqrt{16} \sqrt{-1}$ (because $\sqrt{ab} =\sqrt{a} \sqrt{b}$ )

Since $\sqrt{16}$ =4, and $\sqrt{-1}$ =i, $\sqrt{-16}$ =4i

lesya692 [45]2 years ago

5 0

Answer:

C. 4i

Step-by-step explanation:

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Slav-nsk [51]

Answer:

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Step-by-step explanation:

3x < -21

<u>Step 1: Divide both sides by 3</u>

3x < -21

3x / 3 < -21 / 3

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3 years ago

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svet-max [94.6K]

The correct answer for this question would be option B) 18.8 units or the second option.

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3 years ago

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Answer: Hewo, there! your Answer is Below

18.2 Would be your answer rounded to the nearest tent the Orignal Answer was 18.24

Step-by-step explanation:

Hope this Helps you!!!

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2 years ago

It is known that the point P(-9,18) belongs to the graph of the function y=k/x. Find k.

riadik2000 [5.3K]

Answer:

$k = (-162)$ .

Step-by-step explanation:

A point of the form $(x_{0},\, y_{0})$ belongs to the graph of this function, $y = k / x$ , if and only if the equation of this function holds after substituting in $x = x_{0}$ and $y = y_{0}$ .

The question states that the point $(-9,\, 18)$ belongs to the graph of this function. Thus, the equation of this function, $y = k / x$ , should hold after substituting in $x = (-9)$ and $y = 18$ :