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kolezko [41]
3 years ago
10

The smallest of three consecutive integers is 24 less than the sum of the two larger integers. Find the three integers.

Mathematics
1 answer:
harkovskaia [24]3 years ago
3 0

Answer:

21, 22, 23

Step-by-step explanation:

Construct equations representing each piece of information.

Three consecutive integers are three numbers in a row, for example, 1, 2 and 3.

Let's let

Integer 1 = X

Integer 2 = Y

Integer 3 = Z

X = (Y + Z) - 24

We also know that

Y = X + 1

and Z = X + 2

We can now sub this information into the first equation. We do this so that we can have only one variable in the equation.

X = (X+1) + (X+2) - 24

now solve for x,

X = 2X + 3 - 24

X = 2X - 21

-X = - 21

X = 21

So, the integers are 21, 22, 23

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$11040

Step-by-step explanation:

first of all the question says that $4000 were earned in a year and asks for what the new vale would be after the next 3 years with a discount rate of 8%.

If 1 year=$4000,then 3 years=$12000

100%-8%=92% (this happens because there is still a remaining amount that still has a cost to it),so 12000*92%=$11040

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How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 95% confidence that
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Answer:

61 commuters must be randomly selected to estimate the mean driving time of Chicago commuters.                

Step-by-step explanation:

Given : We want 95% confidence that the sample mean is within 3 minutes of the population mean, and the population standard deviation is known to be 12 minutes.

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At 95% confidence the z-value is z=1.96

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Substitute the value in the formula,

3=\frac{12\times 1.96}{\sqrt{n}}

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Squaring both side,

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Answer:

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