(x+42)3x. solve for x

Mathematics

1 answer:

pishuonlain [190]3 years ago

3 0

Answer: X is equal to either 0 or -42

Step-by-step explanation:

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A yearbook printer charges based on the number of pages printed. Here is a table that shows the cost of some recent yearbooks:

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y = 0.012x + 0.65

Number of pages 50.00 100.00 150.00 200.00 
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x = number of pages
y = cost

intervals of x = 50 pages
intervals of y = 0.60
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y = 0.012x + 0.65

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0.012 100 1.20 0.65 1.85
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Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.65

erma4kov [3.2K]

Answer:

Probability that the sample average is at most 3.00 = 0.98030

Probability that the sample average is between 2.65 and 3.00 = 0.4803

Step-by-step explanation:

We are given that the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.65 and standard deviation 0.85.

Also, a random sample of 25 specimens is selected.

Let X bar = Sample average sediment density

The z score probability distribution for sample average is given by;

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