The answer for your question is
N=2.5
Answer:
<h3>

</h3>
Step-by-step explanation:

Move 5x to left hand side and change it's sign
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Move 3 to right hand side and change it's sign
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Collect like terms
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Subtract 3 from 21
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Divide both sides of the equation by -6
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Calculate
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Hope I helped!
Best regards!!
Answer:
8x^4 - 19
Step-by-step explanation:
g(f(x)) = g(4x^4 - 15) = 2 (4x^4 - 15) + 11
= 8x^4 - 30 + 11
= 8x^4 - 19
Answer:
It is six cm。
Step-by-step explanation:
He is incorrect. When involing cubes, it would be 5*3, it would be 5^3 or 5*5*5. Hope this helps