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hammer [34]
3 years ago
11

Use the distributive property to express 30 + 75

Mathematics
2 answers:
OleMash [197]3 years ago
8 0
Click on  the box for more details on how to <span>distributive property to express 30 + 75.</span>

Tanzania [10]3 years ago
8 0

Answer:

15(2+5).

Step-by-step explanation:

A way to see distributive property is applying common factor. In this case we have that 30 and 75 are multiples of 15, so we can factor 15 as follows:

15 as a factor of the expression and within parentheses the division of numbers by our common factor.

30+75 = 15(2+5).

15(2+5)= 15*2+15*5 =  30+75.

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A random sample of 4"4 fields" of barley has a mean yield of "49.6"49.6 bushels per acre and standard deviation of 7.997.99 bush
ExtremeBDS [4]

Answer:

The critical value that should be used in constructing the interval is T = 5.8408.

The 99% confidence interval for the true mean yield is between 2.943 bushels per acre and 96.268 bushels per acre.

Step-by-step explanation:

We have the standard deviation of the sample, so we use the students t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 4 - 1 = 3

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 3 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 5.8408. This is the critical value.

The margin of error is:

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In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 49.6 - 46.668 = 2.943 bushels per acre.

The upper end of the interval is the sample mean added to M. So it is 49.6 + 46.668 = 96.268 bushels per acre.

The 99% confidence interval for the true mean yield is between 2.943 bushels per acre and 96.268 bushels per acre.

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3 years ago
tickets for a lower level seats sell for $35 each and tickets for an upper level seats sell for $25 each. the theater sells 350
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The work and answer is shown in the image below. Just set the variables and solve.

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