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3 years ago

Finish the polynomial by adding one number to make it a perfect square x^2+18x+

Mathematics

1 answer:

dsp733 years ago

6 0

Answer:

Step-by-step explanation:

${x}^{2} + 18x + {(( \frac{1}{2})(18)) }^{2}$

${x}^{2} + 18x + {9}^{2}$

${x}^{2} + 18x + 81$

${(x + 9)}^{2}$

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A pencil factory makes 50 cases of pencils in 5 hours.

Oduvanchick [21]

If a pencil factory makes 50 cases of pencils in 5 hours. Let's first find out how many cases are made per hour.

50 ÷ 5 = 10 cases per hour

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So it would take 5 1/2 hours to make 55 cases.

Hope this helps. :)

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3 years ago

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3 years ago

When Samuel commutes to work, the amount of time it takes him to arrive is normally distributed with a mean of 32 minutes and a

k0ka [10]

Answer:

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

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Step-by-step explanation:

Let X the random variable that represent the amount of time it takes him to arrive, and for this case we know the distribution for X is given by:

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$P(17$

And we can use the z score formula given by:

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

And we can find the nnumber of deviations from the mean for each limit given:

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3 years ago

The histogram shows the ages of cars sold at a car auction. what percent of the cars was less than 20 years old or more than 40

Alexus [3.1K]

The histogram is attached. Every column shows on the bottom the range of age and on the left the number of cars of that particular age.

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Now, you need to calculate the total number of cars (sum the cars of every column): 3 + 2 + 8 + 4 + 0 + 3 = 20

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Therefore, your answer is 40%.

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3 years ago