Answer:
25.9 yd
Step-by-step explanation:
[tex]a^{2}[/tex] + [tex]{b^{2} }[/tex] = [tex]c^{2}[/tex]
[tex](17)^{2}[/tex] + [tex]{b^{2} }[/tex] = [tex](31)^{2}[/tex]
289 + [tex]{b^{2} }[/tex] = 961
Subtract 289 on both sides
[tex]{b^{2} }[/tex] = 672
[tex]\sqrt{b^{2} }[/tex] = [tex]\sqrt{672}[/tex]
nearest tenth
b = 25.9 yd
