3 years ago

The square root of the sum of a number is 4 is 5. Find the number. What is it?

Mathematics

1 answer:

anzhelika [568]3 years ago

7 0

Answer: 21

<u>Step-by-step explanation:</u>

$\sqrt{n+4}=5\\\\(\sqrt{n+4})^2=(5)^2\\\\n+4=25\\.\underline{\ \ -4\ \ -4}\\\boxed{n\quad \ =\ 21}$

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