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3 years ago

How do i put y= 75x +1,200 in standard form into Ax+ By=c

Mathematics

1 answer:

Anarel [89]3 years ago

7 0

Answer:

-75x + y= 1,200

Step-by-step explanation:

subtract 75x to move to the other side. canceling it out and moving it to the left. it becomes -75x + y and leaving 1,200 alone.

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Which relationships describe the angle pair x° and 157º?

Mice21 [21]

Answer:

Supplementary Angles

Step-by-step explanation:

180-157=23

X=23

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2 years ago

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Maddy draws a new picture every 6 minutes. How many drawings can she make in 8 hours?

Kaylis [27]

Answer:

Roughly 480

Step-by-step explanation:

6 minutes for each drawing, so 10 pictures each hour for 8 hours is roughly 480

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2 years ago

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The incomes in a certain large population of college teachers have a Normal distribution, with mean $75,000 and standard deviati

Natali [406]

Answer:

probability that their average salary is more than $77,500 is 0.1587

Step-by-step explanation:

standard error

= 10,000/sqrt(16)

=10,000/4

= 2500

(77,500 - 75000)/2500

2,500/2500

= 1

p (z > 1) = .1587

So, the probability that their average salary is more than $77,500 is 0.1587

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3 years ago

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The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.

valina [46]

Answer:

A sample of 179 is needed.

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:

$\alpha = \frac{1 - 0.85}{2} = 0.075$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.075 = 0.925$ , so Z = 1.44.

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.

A previous study found that for an average family the variance is 1.69 gallon?

This means that $\sigma = \sqrt{1.69} = 1.3$

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

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

$0.14 = 1.44\frac{1.3}{\sqrt{n}}$

$0.14\sqrt{n} = 1.44*1.3$

$\sqrt{n} = \frac{1.44*1.3}{0.14}$

$(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2$

$n = 178.8$

Rounding up

A sample of 179 is needed.

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3 years ago

Give correct answer please!!!

Anit [1.1K]

The perimeter is 4 $\frac{16}{13}$ or 5 $\frac{3}{13}$

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3 years ago