Answer
The length of QV is 31 units
Explanation
Notice that triangle STR and triangle TQR are congruent by Side-Angle-Side, so ST = TQ
We also know that TQ = 26, and we can infer from our diagram that
, so let's replace the values:
ST = TQ
![3x+2=26](https://img.qammunity.org/2019/formulas/mathematics/middle-school/vtlt8ino5hbvokus5nmtg2pmusk46s9ee2.png)
![3x=24](https://img.qammunity.org/2019/formulas/mathematics/middle-school/v0mfl6mzab87nqb4g96b5enq1ij7mxpobv.png)
![x=(24)/(3)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/9rp3p0uthwe38yphhwr8rqpdlt80ypbck0.png)
![x=8](https://img.qammunity.org/2019/formulas/mathematics/high-school/pp7uhztp3wdfjk86fiqme8246evlug6s3c.png)
Also, notice that triangle SVR is congruent to Triangle VQR by Side-Angle-Side as well, so QV = SV
We know that
, so let's replace the value:
![QV=4x-1](https://img.qammunity.org/2019/formulas/mathematics/middle-school/2all1f8ouox0kx9lgmzfwhzig481pr9sqf.png)
Since we know that
, we can replace the value to find QV:
![QV=4x-1](https://img.qammunity.org/2019/formulas/mathematics/middle-school/2all1f8ouox0kx9lgmzfwhzig481pr9sqf.png)
![QV=4(8)-1](https://img.qammunity.org/2019/formulas/mathematics/middle-school/9p45y4e1m4cqukqdq6c3mb3ohd7f8ckdcl.png)
![QV=32-1](https://img.qammunity.org/2019/formulas/mathematics/middle-school/8360e6twyof6y720q3k8llxoat5tfyhq34.png)
![QV=31](https://img.qammunity.org/2019/formulas/mathematics/middle-school/bdqoduhc7edry6s9ugwbitymciggxv6hgw.png)