How would I solve this correctly?

Answer:
5'10"
Step-by-step explanation:
We can use proportions so we can set up a ratio
[tex]\frac{6.5}{9.75} =\frac{x}{8.75}[/tex]
Cross multiply
[tex]6.5(8.75)=9.75x[/tex]
[tex]56.875=9.75x[/tex]
Divide both sides by 9.75
[tex]5.8333333=x[/tex]
Or [tex]5\frac{10}{12}[/tex] which is 5'10"
I hope this helps