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den301095 [7]
3 years ago
7

Help ASAP pleaseee!!!!!!!

Mathematics
2 answers:
kirill [66]3 years ago
5 0

Answer:

A

Step-by-step explanation:

As they have the same slope they should be parallel so a is the answer

olga nikolaevna [1]3 years ago
3 0

Answer:

Graph D (-1, -2)

Step-by-step explanation:

I graphed the two equations using a graphing tool.

When graphed, they pass at the point (-1,-2).

(-1, -2) is the solution.

It looks like that graph D has the lines passing at the same point.

<em>Option D should be the correct answer. </em>

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A box is to be wrapped in a shiny red decorative paper.The box is 9 inches long,5 inches wide,and 4 inches high.How much wrappin
Gnoma [55]

Answer:

Draw a figure!

There are 6 surfaces to add.

4 of them have area 9*5 and 2 have area 5*4.

You should be able now to compute the surface areas.

Step-by-step explanation:

4 0
3 years ago
Cynthia's grandpa says that his first simple calculator cost $80. Cynthia knows she just bought a new calculator for $4. What is
kykrilka [37]

Answer:

95%

Step-by-step explanation:

Difference / Original x 100

76/80 x 100

95%

8 0
2 years ago
What is the slope of the line?<br><br> A. 0<br> B. no slope<br> C. -2<br> D. 1
kirza4 [7]
I think the answer is (C.)
3 0
3 years ago
Read 2 more answers
Grading managers. Some companies "grade on a bell curve" to compare the performance of their managers and professional workers.
Monica [59]

Answer:

\mu = 250, \sigma = 175.781

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the grades of a population, and for this case we know the distribution for X is given by:

X \sim N(\mu,\sigma)  

For this case we have two conditions given:

P(X

P(X>475) = 0.1 or equivalently P(X

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

So we can find a value from the normal standard distribution that accumulates 0.1 and 0.9 of the area in the left, for this case the two values are:

z= -1.28, z=-1.28

We can verify that P(Z<-1.28) =0.1[/tex] and P(Z<1.28) =0.9[/tex]

And then using the z score we have the following formulas:

-1.28 = \frac{25 -\mu}{\sigma}   (1)

1.28 = \frac{475 -\mu}{\sigma}   (2)

If we add equations (1) and (2) we got:

\frac{25 -\mu}{\sigma} + \frac{475 -\mu}{\sigma} =0

We can multiply both sides of the equation by \sigma and we got:

25+ 475 -2 \mu = 0

\mu = \frac{500}{2}= 250

And then we can find the standard deviation for example from equation (1) and we got:

\sigma = \frac{25-250}{-1.28}=175.781

So then the answer would be:

\mu = 250, \sigma = 175.781

 

3 0
2 years ago
How do you solve even number between 300 and 400 it is divisible by both 5 and 9 how you solve it
BigorU [14]
The correct answer would be 360. you go through the multiples of 5 and 9
6 0
3 years ago
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