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3 years ago

In what quadrant would the ordered pair (-5, 4) be located? I II III IV

1 answer:

7 0

Ok, so
Quadrants are found on coordinate planes. So the first number tells you to go on the X axis. It goes this way ---------
you look on the left side side of the origin (zero) and go to -5
since the second umber will be found on the Y axis, and is positive, go up to 4.
That is how you find your point. The qudrants are counted like this.
2 1
3 4
The answer is Quadrant 2
Hope it helped☺

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A=-2(negative 2) b=3 and c=5 what is 3ac-a+2b.With explanation

KIM [24]

Step-by-step explanation:

a = -2

b = 3

c = 5

<h2>Question:</h2>

$3ac - a + 2b$

= Solution,

= 3 ( - 2 ) × 5 - ( - 2 ) + 2 × 3

here ... ( + ) × ( - ) = ( - )

= - 6 × 5 - ( - 2 ) + 2 × 3

here .... ( - ) × ( - ) = ( + )

= - 6 × 5 + 2 + 2 × 3

= - 30 + 2 + 6

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2 years ago

An analytical laboratory is asked to evaluate the claim that the concentration of the active ingredient in a specimen is 86%. Th

Olenka [21]

Answer:

Decision rule

Reject null hypothesis

Conclusion

There is significance evidence that the true mean is different from 0.86

Step-by-step explanation:

From the question we are told that

The population mean $\mu = 0.86$

The sample is mean is $\= x = 0.8708$

The standard deviation is $\sigma = 0.0068$

The level of significance is $\alpha = 0.01$

The sample size n = 3

The null hypothesis is $\mu = 0.86$

The alternative hypothesis is $\mu \ne 0.86$

Generally the test statistics is mathematically represented as

$z = \frac{\= x - \mu }{ \frac{\sigma}{\sqrt{n} } }$

=> $z = \frac{ 0.8708 - 0.86 }{ \frac{0.0068}{\sqrt{3} } }$

=> $z = 2.751$

Generally p- value is mathematically represented as

$p-value = 2 P(z >2.751 )$

From the z-table

$P(z >2.751 ) = 0.0029707$

$p-value = 2 * 0.0029707$

=> $p-value = 0.00594$

From the obtained question we see that $p-value < \alpha$

Hence we reject the null hypothesis

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3 years ago

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because

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Dahasolnce [82]

Answer:

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Step-by-step explanation:

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klemol [59]

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