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Illusion [34]
2 years ago
5

Solve each system of linear equations by elimination. X-6y=7 -x+6y= -7 -​

Mathematics
1 answer:
ehidna [41]2 years ago
5 0

Answer:

Infinitely many solutions.

Step-by-step explanation:

x-6y=7

-x+6y=-7

--------------

0=0

infinitely many solutions.

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The population of a certain country is expected to double every 32 years. The population of this country was 4.2 million people
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Answer:

2.2%

Step-by-step explanation:

Given the following :

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Expected population every 32 years = 2 *A

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The population figure after 32 years = (2 * 4.2 million) = 8.4 million

Using the exponential growth formula :

P(t) = A × (1 + r)^t

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g^32 = (8400000/4200000)

g^32 = 2

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g = 1.02189714865

g = (1 + r)

1.02189714865 = 1 + r

r = 1.02189714865 - 1

r = 0.02189714865

.rate = 0.02189714865 * 100

= 2.18971486541%

= 2.2% ( nearest tenth)

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Step-by-step explanation:

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