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3 years ago

About 400.000 people visited an art museum in December. What could be the exact number of people who visited the art museum?

Mathematics

1 answer:

grandymaker [24]3 years ago

4 0

it is 400,000 because it says about so we have to round so 0 is little so the 4 stay's the same

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Solve the equation: k^2+5k+13=0

mr_godi [17]

Step-by-step explanation:

k² + 5k + 13 = 0

Using the quadratic formula which is

$x = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac } }{2a} \\$

From the question

a = 1 , b = 5 , c = 13

So we have

$k = \frac{ - 5 \pm \sqrt{ {5}^{2} - 4(1)(13) } }{2(1)} \\ = \frac{ - 5 \pm \sqrt{25 - 52} }{2} \\ = \frac{ - 5 \pm \sqrt{ - 27} }{2} \: \: \: \: \: \: \\ = \frac{ - 5 \pm3 \sqrt{3} \: i}{2} \: \: \: \: \: \:$

Separate the solutions

$k_1 = \frac{ - 5 + 3 \sqrt{3} \: i }{2} \: \: \: \: or \\ k_2 = \frac{ - 5 - 3 \sqrt{3} \: i}{2}$

The equation has complex roots

Separate the real and imaginary parts

We have the final answer as

$k_1 = - \frac{5}{2} + \frac{3 \sqrt{3} }{2} \: i \: \: \: \: or \\ k_2 = - \frac{5}{2} - \frac{3 \sqrt{3} }{2} \: i$

Hope this helps you

8 0

2 years ago

Which expression is the additive inverse of n? A. 1/n B. -n C. -1/n D. -(-n)

Marrrta [24]

The additive inverse of something is whats added to the original to get 0

So in this case n - n = 0, which is B :)

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I just want to know if I’m right

Svetradugi [14.3K]

Answer:

correct

Step-by-step explanation:

supplementary is when 2 angles add up to 180

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Choose the correct classification of (3x^3 + 2x^2 - 5x)

Irina-Kira [14]

Answer:

Below.

Step-by-step explanation:

It is a polynomial of degree 3.

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3 years ago

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