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Black_prince [1.1K]
3 years ago
5

Please help it's 20 and 22 Find he value of the Variables

Mathematics
1 answer:
KIM [24]3 years ago
3 0
20 x=5 I hope this helps
22.x=15
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Which of the following are necessary when proving that the opposite angles of a parallelogram are congruent? A. Opposite sides a
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C and B

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Total area of new carpeting installed: 368

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DerKrebs [107]

Answer:

The percentage increase in bird population in the second years is 4%  .

Step-by-step explanation:

Given as :

During two years, the population of birds of an island became 7 times more than before.

The the percentage increase in first year = = r_1 =40%

Let The percentage increase in second year =  r_2 = r%

So, According to question

The initial population of bird = x

The increase population of bird =7 times before = 7 x

Now,

The increase population of bird = initial population of bird × (1+ \dfrac{r_1}{100}) ×  (1+ \dfrac{r_2}{100})

Or, 7 x = x × (1+ \dfrac{40}{100}) ×  (1+ \dfrac{r}{100})

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∴ r = 4 × 100

I.e r = 400

so, The percentage increase = r% = 4

Hence The percentage increase in bird population in the second years is 4%  . Answer

3 0
3 years ago
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