Respuesta :

Answer:

Step-by-step explanation:

x=[tex]\sqrt{15^{2} -12^{2} }[/tex]

x=9 in.

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The Pythagorean theorem is a^2+b^2=c^2

So if we plug in a as 12 and c as 15 we get 144+b^2=225 we then solve to get b^2=81 and so b=9.

In your case, b=x, therefore x=9.

The length of the brace for the mainsail of the boat is 9in.