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alekssr [168]
3 years ago
14

Calculate the mean. 4, 5, 7, 7, 9, 12, 15, 20

Mathematics
1 answer:
Semmy [17]3 years ago
5 0

Answer:

Mean: 9.875

Median: 8

Mode: 7

Minimum: 4

Maximum: 20

Range: 16

Size: 8

Sum: 79

Step-by-step explanation:

How to find the mean?

1. Count the number N of data points in your data set.

2. Sum up all of the data points in your data set (add them all together).

3. Average = Mean = Sum/N.

How to find the median ?

The median is the numeric value separating the upper half of a sample data set from the lower half. The median of a data set can be found by arranging all the values from lowest to highest value and picking the one in the middle. If there is an odd number of data values then the median will be the value in the middle. If there is an even number of data values the median is the mean of the two data values in the middle.

For the data set 1, 1, 2, 5, 6, 6, 9 the median is 5.

For the data set 1, 1, 2, 6, 6, 9 the median is 4. It is the mean of 2 and 6 or, (2+6)/2 = 4.

How to find the mode

Mode is the value or values in the data set that occur most frequently.  

For the data set 1, 1, 2, 5, 6, 6, 9 the mode is 1 and also 6.

Hope this helps you! :D

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How can a mixed number be written as a sum?
k0ka [10]
First, write the mixed number as a sum of a whole number and a proper fraction. Then write the two parts with common denominator , and add. Once you're used to this, you can use a shortcut method: 1) Multiply the whole part by the denominator of the fractional part, and add the numerator of the fractional part.
8 0
3 years ago
Help someone please ASAP
Klio2033 [76]

1.

3 x 4 = 12

3 + 4 = 12

The two integers a and b are : 3 and 4


2.

-4 x 1 = -4

-4 + 1 = -3

The two integers a and b are : -4 and 1


3.

-3 x -3 = 9

-3 + -3 = -6

The two integers a and b are : -3 and -3


There you go! I really hope this helped, if there's anything just let me know! :)

7 0
3 years ago
75 miles to 225 miles as a fraction in simplest form
Pie

Answer:

\frac{1}{3}

Step-by-step explanation:

When reducing a number to its lowest term you use the GCF of the denominator and numerator then divide using this number. :

\frac{75}{225} ÷\frac{75}{75} = \frac{1}{3}

The gcf of 75 and 225 is 75 so we divide both the numerator and denominator by 75.

HOPE THIS HELPED

5 0
3 years ago
I’ll mark you if it’s right.
Kamila [148]

Answer:

(-3, -1)

If you rotate 180, you just flip the signs.

6 0
3 years ago
Plz help me plzz i need it
Shtirlitz [24]

Answer:

second one

Step-by-step explanation:

8 0
3 years ago
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