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Aliun [14]
2 years ago
9

The arrows shown in the asthenosphere represent the inferred

Chemistry
1 answer:
nata0808 [166]2 years ago
8 0

Red arrows represent the movement of the mantle due to convection. Black arrows represent the movement of the plates due to gravity. Scientists think that this transfer of thermal energy from core to mantle causes convection in the mantle.

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What is 30-9x2*2-21-4+4
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Answer:
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Explanation:
The given expression is:
30 - 9x²*2 - 21 - 4 + 4
The first step is to compute the multiplication. This will give:
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Then, we will add like terms as follows:
(30-21-4+4) - 18x²
= 9 - 18x²
Finally, we can take the 9 as a common factor from both terms, this will give:
9 (1-2x²)

Hope this helps :)

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