Question 392735
<br><font face="Tahoma">On this one, you should cross-multiply: <br>

{{{13/11=v/7}}}<br>

{{{13*7=11v}}}<br>

{{{91=11v}}}<br>

{{{91/11=v}}}<br>

{{{v=8.272727...}}}<br>

{{{v=8.3}}}<br>

I hope this helps!<br>