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# Which equation represents the value of x?

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Which equation represents the value of x?

x=√y²+100

x=10−y

x=10+y²

x=√100−y²

Guest May 21, 2017
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$$x^2+y^2=10^2 <=> x^2+y^2=100 <=> x^2=100-y^2 <=> x=\sqrt{100-y^2}$$

So :$$x=\sqrt{100-y^2}$$

Whitespy001  May 21, 2017