In the equation, the value of y will be different as a result of the signs that are used.
<h3>How to solve the equation</h3>
In the first equation, 5y + 10 = 25. To find the value of y goes thus:
5y + 10 = 25
5y = 25 - 10
5y = 15
y = 15/5 = 3
Also, 5y - 10 = 25
5y = 25 + 10
5y = 35
y = 35/5 = 7
The values of y are 3 and 7.
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The Ocean around the North Pole is called Arctic Ocean.
A radioactive element with a half-life of 1,000 years, and starting mass of 20 grams, will need 2,000 years to decrease to 5 grams.
Explanation:
The radioactive elements all have a specific half-life. Each element's half-life is well known, and they are used by scientists of numerous fields as they are excellent for determining the age of a particular item, be it or organic or non-organic nature. In this case, we have a radioactive element with a half-life of 1,000 years, and starting mass of 20 grams.
The half-life basically means that half of the mass of an element is lost during a particular period of time. For the element in question we need to find out how much time will be needed for it to decrease to 5 grams. In order to get to the result, we just need to add 1,000 years on every decrease of half of the mass:
20/2 = 10
10/2 = 5
So in 1,000 years, the element in question will decrease to 10 grams, and in further 1,000 years (2,000 cumulatively) it will decrease to 5 grams.
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The geography of East Asia is described as mountainous. An example is the geography of west and north China. It is usually dominated with mountains, steppe lands, plateaus, and deserts. I hope my answer has come to your help. God bless and have a nice day ahead!
