<u>Answer:</u>
<h2>Romania</h2>
U.S: 272,648,000÷9,364,520= 29.12
<u><em>Step-by-step</em><em> </em><em>explaination</em></u>
US: 29.12 people per square km
Romania: 22,609,000÷237,391= 95.24
Romania: 95.24 people per square km
Ghana: 18,339,000÷237,553= 77.20
Ghana: 77.2 people per square km
Answer:
Step-by-step explanation:
9x - 77 = 7x - 43
2x - 77 = -43
2x = 34
x = 17
9(17) - 77 = 153 - 77 = 76
7(17) - 43 = 119 - 43 = 76
z + 76 = 180
z= 104
7x+8y=19
-6x -8y=18
--------------- <em>Add both equations</em>
x = 37
Using x = 37 in the first equation:
7(37)+8y=19
259+8y = 19
8y = 19 - 259
8y = -240
y = -240/8
<h3>y = -30</h3>
Answer: median = 61
Reason:
A normal distribution is perfectly symmetric. Such distributions have mean = median = mode.
The solution of the system of equation of the matrix is as follows:
x = - 8
y = 3
<h3>How to find the solution of matrix?</h3>
3x + 10y = 6
x + 3y = 1
multiply equation(ii) by 3
3x + 10y = 6
3x + 9y = 3
Therefore,
y = 3
Hence,
x + 3y = 1
x + 3(3) = 1
x + 9 = 1
x = 1 - 9
x = -8
learn more on matrix here: brainly.com/question/9967572
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