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Alekssandra [29.7K]
2 years ago
14

What is 2xy+7y-19x²y=2x simplified?

Mathematics
1 answer:
denpristay [2]2 years ago
7 0

Answer:

Solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.

x=\frac{y-1+\sqrt{134^2-2y+1} }{19y}

x=\frac{y-1-\sqrt{134^2-2y+1} }{19y}

Thanks!

Mark me brainliest!

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Solve the equation:<br> -1/2 (t+3) -10 = -6.5
liq [111]
-1/2 (t+3) -10 = -6.5

t = - 10
7 0
3 years ago
The farmer owned 100 acres of land. A year later he bought more property and then owned 140 acres. Is this a percent increase or
Grace [21]

Answer:

The percentage change (an increase) wa 40%.

Step-by-step explanation:

The beginning number of acres was 100; adding 40 more brought that to 140 acres.  This was an increase.  Dividing the increase (40) by the starting value (100) yields 0.40.  Finally, multiplying this result by 100% yields 40%.

The percentage change (an increase) wa 40%.

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A battery has a lifetime that is approximately normally distributed with a mean of 600 hours and a standard deviation of 50 hour
miss Akunina [59]

Answer:

A. Your battery is likely defective since such poor performance is extremely unlikely.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

If X is more than two standard deviations from the mean, it is considered an unlikely outcome.

In this question, we have that:

\mu = 600, \sigma = 50

Which of the following conclusions is the most appropriate given this information?

Lasted 400 hours, so X = 400.

Z = \frac{X - \mu}{\sigma}

Z = \frac{400 - 600}{50}

Z = -4

4 standard deviations from the mean, so unlikely.

So the correct answer is:

A. Your battery is likely defective since such poor performance is extremely unlikely.

3 0
3 years ago
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Answer:

288

Step-by-step explanation:

it's pretty simple, if u do 96 * 3, it will be that. yw :)

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Is eliana right or wrong? Explain please! Brainliest for right answer
likoan [24]
She is wrong she should have added 18 to both sides
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3 years ago
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