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kap26 [50]
3 years ago
14

What is the solution to the quadratic equation? y = x^2-4

Mathematics
1 answer:
Anika [276]3 years ago
7 0

(-2,2)

i just did my homework with the same question

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Can someone tell me the answer
astra-53 [7]

Answer:

-3

Step-by-step explanation:

(-6)/(+2)

-6/+2

-3

5 0
3 years ago
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The standard deviation of a sample taken from population A is 17.6 for a sample of 25.
lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation \sigma_A is

\sigma_A = 17.6

The sample size n_A is:

n_A = 25.

For the sample of population B, the standard deviation \sigma_B is

\sigma_B = 21.2

The sample size n_B is:

n_B = 30.

Then the standard deviation for the difference of means has the following form:

\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}

Finally

\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23

7 0
3 years ago
Write 0.0059 in scientific notation.
polet [3.4K]
Hi!

When we write a number in scientific notation, we write it like this:
N × 10^{x}

N = a number between one and 10
x = negative if the decimal is moved to the right. positive if moved to the left.

Okay, so we need to move the decimal in the number <span>0.0059 to the right to make it between one and 10.
0.0059
00.059
000.59
0005.9
5.9

N = 5.9
5.9 </span>× 10^{-x}

Since we moved the decimal to the right 3 times,
x = -3

5.9 × 10^{-3}
^ the answer

Hope this helps! :)
7 0
3 years ago
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. Does the model represent asexual or sexual reproduction?
LuckyWell [14K]

Answer:

excusme where is the model

Step-by-step explanation:

7 0
2 years ago
X - (2x + 1) = 8 - (3x + 2)
vlada-n [284]

Answer:

x=7/2

Step-by-step explanation:

7 0
3 years ago
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