Answer:
C. 126
Step-by-step explanation:
We can use ratios to solve for corresponding side lengths.
[tex]\frac{140-x}{81} =\frac{x}{9}[/tex]
Cross multiply.
[tex]9(140-x)=81x[/tex]
[tex]140-x=9x[/tex]
[tex]140=10x[/tex]
[tex]14=x[/tex]
Plug x as 14.
[tex]140-14=126[/tex]
