Answer:
x = [tex]3\sqrt{11}[/tex]
Step-by-step explanation:
Using Pythagorean Theorem we can say;
15² + x² = 18²
225 + x² = 324
x² = 99
x = [tex]\sqrt{99}[/tex]
To simplify this in the radical for we can say:
[tex]\sqrt{9*11}[/tex]
[tex]\sqrt{9}*\sqrt{11}[/tex]
[tex]3\sqrt{11}[/tex]
So the answer = [tex]3\sqrt{11}[/tex]
Hope this helps!
