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iris [78.8K]
3 years ago
15

Find the solution of the system of equations. -x+2y=-15 8x-2y=-20

Mathematics
1 answer:
Grace [21]3 years ago
8 0

Answer:

the answer is (-5,-10)

hope this helps :)

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A washer and dryer cost a total of $1152. The cost of the washer is two times the cost of the dryer. Find the cost of each item.
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Answer: 576 for both

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3 years ago
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The graph of a linear function is shown.
lawyer [7]

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Step-by-step explanation:

y=1/5+0 is the answer to your problem I very much believe

4 0
3 years ago
in the unted states, the height of men are normally distributed with the mean 69 inches and standard deviation 2.8 inches. If 16
yaroslaw [1]

Answer:

Probability that their mean height is less than 68 inches is 0.0764.

Step-by-step explanation:

We are given that in the united states, the height of men are normally distributed with the mean 69 inches and standard deviation 2.8 inches.

Also, 16 men are randomly selected.

<em>Let </em>\bar X<em> = sample mean height</em>

The z-score probability distribution for sample mean is given by;

              Z = \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \mu = population mean height = 69 inches

            \sigma = population standard deviation = 2.8 inches

            n = sample of men = 16

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) 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.

So, probability that the mean height of 16 randomly selected men is less than 68 inches is given by = P(\bar X < 68 inches)

 P(\bar X < 68 inches) = P( \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } } < \frac{68-69}{\frac{2.8}{\sqrt{16} } } ) = P(Z < -1.43) = 1 - P(Z \leq 1.43)

                                                           = 1 - 0.9236 = 0.0764

<em>Now, in the z table the P(Z  x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 1.43 in the z table which has an area of 0.92364.</em>

Therefore, probability that their mean height is less than 68 inches is 0.0764.

3 0
4 years ago
53.58 is 47 percent of what?
I am Lyosha [343]

Answer:114

Sorry

Step-by-step explanation:

8 0
3 years ago
PLEASE HELP ASAP WILL GIVE BRAINLIEST !!!
My name is Ann [436]

Answer:

7/3

Step-by-step explanation:

7/3

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