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3 years ago

What is the answer to d-4 =19;d =15

Mathematics

2 answers:

VashaNatasha [74]3 years ago

6 0

It would be: d - 4 = 19
d = 19 + 4
d = 23

In short, Value of d would be 23, instead of 15

Hope this helps!

aleksandrvk [35]3 years ago

3 0

D-4=19
d=4+19 or d=23

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mafiozo [28]

Find out how much one bag costs
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3 years ago

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BigorU [14]

Answer:

Step-by-step explanation:

The percent markup is basically how much it is MORE than the original.

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How much is the markup, we just found, with respect to cost? That is the markup divided by cost, multiplied by 100 [to convert to percentage]. Shown below:

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3 years ago

Find the mean absolute deviation of the following set of data.

Katen [24]

Answer:

The mean absolute deviation is 5.952 ⇒ 3rd answer

Step-by-step explanation:

* Lets talk about the mean absolute deviation

- Mean absolute deviation (MAD) of a data set is the average distance

between each data value and the mean

1- To find the mean absolute deviation of the data, start by finding

the mean of the data set.

2- Find the sum of the data values, and divide the sum by the

number of data values.

3- Find the absolute value of the difference between each data value

and the mean ⇒ |data value – mean|

4- Find the sum of the absolute values of the differences.

5- Divide the sum of the absolute values of the differences by the

number of data values

* Now lets solve the problem

- The set of data is 31.8 , 22.6 , 13.8 , 16.4 , 28.1

# Find the mean

∵ The mean = sum/ number

∴ The mean = (31.8 + 22.6 + 13.8 + 16.4 + 28.1)/5 = 112.7/5 = 22.54

# Find |data value – mean|

∵ I31.8 - 22.54I = 9.26

∵ I22.6 - 22.54I = 0.06

∵ I13.8 - 22.54I = 8.74

∵ I16.4 - 22.54I = 6.14

∵ I28.1 - 22.54I = 5.56

# Find the sum of the absolute values

∴ The sum = 9.26 + 0.06 + 8.74 + 6.14 + 5.56 = 29.76

# Find the mean absolute deviation

∵ The mean absolute deviation = sum of absolute values/number

∴ The mean absolute deviation = 29.76/5 = 5.952

* The mean absolute deviation is 5.952

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4 years ago

The scores and their percent of the final grade for a statistics student are given. What is the student's weighted mean score?

Phantasy [73]

Answer:

The student's weighted mean score is 92.2.

Step-by-step explanation:

To find the student's weighted mean scored, we multiply each grade by it's weight.

Grades and weights:

Homework: Grade of 86, weight of 20% = 0.2

Quiz: Grade of 87, weight of 5% = 0.05

Quiz: Grade of 91, weight of 5% = 0.05

Project: Grade of 98, weight of 45% = 0.45

Final Exam: Grade of 88, weight of 25% = 0.25.

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3 years ago

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Dmitry [639]

Approximate circumference of a semicircle with a radius of 30 centimeters is 94.2 centimeter

Solution:

Given semicircle with a radius of 30 centimeters

To find: approximate circumference of a semicircle

To find circumference of semicircle we can divide the circumference of circle by 2

circumference of semicircle = circumference of circle $\div$ 2

$\text{ circumference of semicircle} = \frac{2 \pi r}{2} = \pi r$

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$\text{ circumference of semicircle} = 3.14 \times 30 = 94.2$

Thus approximate circumference of a semicircle with a radius of 30 centimeters is 94.2 centimeter

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3 years ago