Answer: [tex]x=15.90597[/tex]
Step-by-step explanation:
Use pythagorean theorem [tex]a^2+b^2=c^2[/tex]
[tex](6)^2+b^2=(17)^2[/tex]
[tex]36+b^2=289[/tex]
[tex]b^2=253[/tex]
[tex]b=15.90597[/tex]