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nikitadnepr [17]
3 years ago
7

What multiplies to 18 and sums up to negative 19

Mathematics
1 answer:
Karolina [17]3 years ago
8 0

Answer:

-18 and -1

Step-by-step explanation:

(-18) + (-1) = -19

(-18) × (-1) = 18

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A large on-demand, video streaming company is designing a large-scale survey to determine the mean amount of time corporate exec
Firdavs [7]

Answer:

554 executives should be surveyed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Standard deviation of 3 hours.

This means that \sigma = 3

The 95% level of confidence is to be used. How many executives should be surveyed?

n executives should be surveyed, and n is found with M = 0.25. So

M = z\frac{\sigma}{\sqrt{n}}

0.25 = 1.96\frac{3}{\sqrt{n}}

0.25\sqrt{n} = 1.96*3

\sqrt{n} = \frac{1.96*3}{0.25}

(\sqrt{n})^2 = (\frac{1.96*3}{0.25})^2

n = 553.2

Rounding up:

554 executives should be surveyed.

8 0
3 years ago
A stand was selling 8 mangos for 10 dollars at a farmer's market.
MaRussiya [10]
(Ms)Kisha is correct.

How?

Well, I figured this out by using common sense. 8 mangoes are 10 dollars. Since the price is higher than the amount, so it has to be at least more than one.

We could write more ratios. You can always write more ratios. You just multiply/divide both sides. Examples below:
2:5
16:20
5 0
3 years ago
Can anyone help me with this problem???
jasenka [17]

Note that x is the hypotenuse of a right triangle. Applying the Pyth. Thm.,


x^2 = 2^2 + 6^2, or x^2 = 4 + 36 = 40.


Thus, the hypotenuse is +sqrt(40), or 2sqrt(10).

8 0
2 years ago
What is the word for:<br><br> The solid, liquid, or gas through which sound travels:
mash [69]

Answer:

I believe your answer would be <u><em>Soundis</em></u>

6 0
2 years ago
Read 2 more answers
HI PLZ HELPI NEED AN ANSWER!! (And will mark brainliest if a legit answer thanks)
trapecia [35]

Option 3: a 90 degree rotation clockwise

You can tell that it is 90 degrees because the original started completely in quadrant 2 and the final image is completely in quadrant 1. If it was only rotated 45 degrees the final image would be part in quadrant 2 and part in quadrant 1. It was rotated clockwise because that is the way a clock goes.

Hope this helps! ;)

6 0
3 years ago
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