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liubo4ka [24]
3 years ago
11

What is the square root of -1

Mathematics
1 answer:
MAXImum [283]3 years ago
5 0

Answer:

i

Step-by-step explanation:

\sqrt{-1} is the same thing as i, which is an imaginary number.

Since you can't take the square root of negative numbers, we use i to do it.

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What is 42% expressed as a fraction? A 42%/1 B 21/50 C 42/10
masya89 [10]

Answer:

the answer will be 21/50

Step-by-step explanation:

Convert to a fraction by placing the expression over 100

21/50

6 0
3 years ago
Determine the length of PN and the value of y
e-lub [12.9K]

Answer:

Side PN=26

y=16

Step-by-step explanation:

I put a photo of my work. It’s easier to do that then to try and put it all in words

7 0
3 years ago
Which polynomial function has a leading coefficient of 1 and roots (7 i) and (5 – i) with multiplicity 1? f(x) = (x 7)(x – i)(x
Nuetrik [128]

It looks like you might have intended to say the roots are 7 + i and 5 - i, judging by the extra space between 7 and i.

The simplest polynomial with these characteristics would be

f(x) = (x - (7 + i)) (x - (5 - i))

but seeing as each of the options appears to be a quartic polynomial, I suspect f(x) is also supposed to have only real coefficients. In that case, we need to pair up any complex root with its conjugate to "complete" f(x). We end up with

f(x) = (x - (7 + i)) (x - (7 - i)) (x - (5 - i)) (x - (5 + i))

which appears to most closely resemble the third option. Upon expanding, we see f(x) does indeed have real coefficients:

f(x) = (x^2 - (7^2 - i^2)) (x^2 - (5^2 - i^2)) = (x^2 - 8) (x^2 - 6) = x^4 - 14x^2 + 48

5 0
2 years ago
Y=-3x+5 <br> 5x-4y=-3<br> Trying to solve this problem
rodikova [14]
Your answer would be y= 5x/-4 - 3/-4 because you’ll move 5x to the other side of the equal sign then divide -4 to get y by itself
5 0
2 years ago
What has a one dimensional and have infinite length
lina2011 [118]
A line. It goes in both directions forever
3 0
3 years ago
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