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Damm [24]
3 years ago
13

Solve using the Quadratic Formular 2x^2- 6x +5=0

Mathematics
2 answers:
Levart [38]3 years ago
8 0

Do you have options?

Brums [2.3K]3 years ago
7 0

Answer:

no real solution

Step-by-step explanation:

x= 3/2 + 1/2i

x= 3/2 - 1/2i

=1.5 plus or minus 0.5i

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Step-by-step explanation:

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A test score of 48.4 on a test having a mean of 66 and a standard deviation of 11. Find the ​z-score corresponding to the given
Mariulka [41]

Answer:

A. -1.6; not significant

Step-by-step explanation:

The z-score of a data set that is normally distributed with a mean of \bar x and a standard deviation of \sigma, is given by:

z=\frac{x-\bar x}{\sigma}.

From the question, the test score is: x=48.4, the mean is \bar x=66, and the standard deviation is \sigma =11.

We just have to plug these values into the above formula to obtain:

z=\frac{48.4-66}{11}.

This simplifies to:  z=\frac{-17.6}{11}.

z=-1.6.

We can see that the z-score falls within two standard deviations of the mean.

Since -2\le-1.6\le2 the value is not significant.

The correct answer is A. -1.6; not significant

3 0
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