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Allisa [31]
3 years ago
11

How do u solve this question in the picture

Mathematics
1 answer:
dedylja [7]3 years ago
6 0
1/2 over -2/5 + (-1/4) 

10/20 over -8/20 + (-5/20) 

1 5/20 + (-5/20) 

1

The answer is 1
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When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus
Blababa [14]

Answer:

By the Empirical Rule, \pm 3\sigma

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

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99.7% of the measures are within 3 standard deviations of the mean.

The symbol of a standard deviation is \sigma. So

When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus how many sigma?

By the Empirical Rule, \pm 3\sigma

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3 years ago
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Find the slope of the line 4x-8y=15
Arisa [49]

Answer:

-1 \frac{7}{8}

Step-by-step explanation:

4x-8y=15

4x-8y-4x=15-4x

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slope is -1 7/8

4 0
3 years ago
When solving equations with square roots it is important to do which of the following?
Mamont248 [21]

Answer:make sure the value of x is positive

-check the solution to ensure it is a rational number

Step-by-step explanation:                            .

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3 years ago
The sum of two positive numbers is 588. minimize the sum of the first and three times the second
Marianna [84]

9514 1404 393

Answer:

  {587, 1}

Step-by-step explanation:

The sum will be minimized when the second number is as close to zero as is allowed. If the numbers must be positive integers, the sum is minimized when the numbers are {587, 1}.

If the numbers may be real numbers, then the values that minimize the sum are {588-, 0+}

_____

The "cost" of taking a unit from the sum 588 and assigning it to the second number is that the sum of first and 3 times the second goes up by 3. In order to minimize that sum, the second number must be minimized.

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3 years ago
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