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31-05-2018
Mathematics

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What is the value of x to the nearest tenth?
A. 6.0
B. 13.4
C. 26.8
D. 30.0

What is the value of x to the nearest tenth A 60 B 134 C 268 D 300 class=

Respuesta :

02-06-2018

Use the Pythagorean theorem:

[tex]\left(\dfrac{1}{2}x\right)^2+12^2=18^2\\\\\dfrac{1}{4}x^2+144=324\ \ \ |-144\\\\\dfrac{1}{4}x^2=180\ \ \ \ |\cdot4\\\\x^2=720\to x=\sqrt{720}\\\\\boxed{x\approx26.8}[/tex]

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