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Lemur [1.5K]
3 years ago
7

Which expression represents the phrase "twice the sum of a number and three"?

Mathematics
2 answers:
Karo-lina-s [1.5K]3 years ago
5 0
<span>2(n+3)
"sum of" is the clue meaning whatever follows those words should be set off alone in parenthesis</span>
exis [7]3 years ago
3 0
2(n+3)
two times the sum of a number (n) and 3
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(x-2)e2/3=49<br><img src="https://tex.z-dn.net/?f=%28x%20-%202%29%20%5E%7B2%20%5Cdiv%203%7D%20%20%3D%2049%20" id="TexFormula1" t
fredd [130]

\bf (x-2)^{2\div 3}=49\implies (x-2)^{\frac{2}{3}}=7^2\implies \stackrel{\textit{raising both sides by }\frac{3}{2}}{\left( (x-2)^{\frac{2}{3}} \right)^{\frac{3}{2}}=(7^2)^{\frac{3}{2}}} \\\\\\ (x-2)^{\frac{2}{3}\cdot \frac{3}{2}}=7^3\implies (x-2)^1=7^3\implies x=7^3+2\implies x=345

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