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Tju [1.3M]
3 years ago
15

Question 1

Mathematics
1 answer:
Alborosie3 years ago
5 0

Answer:

{ \tt{question \: 1 : }} \\ 2 {x}^{2}  - 4x - 3 = 0 \\ x = 2.58 \:  \: and \:  \:  - 0.58 \\  \\  { \tt{question \: 2 : }} \\ x(x - 2) = 4 \\ x = 4 \:  \: and \:  \: 6 \\  \\  { \tt{question \: 3 : }} \\ {9x }^{2}  + 12x + 4 = 0 \\ (3x + 2)(x - 9) = 0 \\ x =  \frac{ - 2}{3}  \:  \: and \:  \: 9 \\  \\ { \tt{question \: 4 : }} \\  {x}^{2}  + 2x = 1 \\  {x}^{2}  + 2x - 1 = 0 \\ x = 0.41 \:  \: and \:  \:  - 2.41

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Step-by-step explanation:

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Answer:

Greatest population density: Denmark

Smallest population density: The U.S.

Step-by-step explanation:

Population density = population / area

So let's find the population density of each country

For U.S

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Area: 9,364,520 sq km

Population density: 272,648,000/9,364,520=29.1 ( rounded to the nearest tenth )

So the population density of the U.S is 29.1 people per sq km

For Denmark

Population: 5,248,000

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Population density: 5,248,000/42,077=124.7 ( rounded to the nearest tenth )

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For Ghana

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Population density: 18,339,000/237,533=77.2 ( rounded to the nearest tenth ).

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Now that we have calculated the population density of each country let's look back at the question

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Looking at the population densities we can conclude that Denmark has the largest population density at 124.7 people per sq km and the U.S. has the smallest population density at 29.1 people per sq km

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