Answer:
The amount of reward that Sophia receives is
![\$13](https://img.qammunity.org/2020/formulas/mathematics/high-school/mvlc8x9bt6tyomfe0su0jgers22kokga9d.png)
Explanation:
Let
x------> amount of reward that Sophia receives
y-----> amount of reward that Isabella receives
we know that
![(x)/(y)=(1)/(8)](https://img.qammunity.org/2020/formulas/mathematics/high-school/n7ospp9mv67r1f97wdqt5k4eoes7zzmynr.png)
------> equation A
-----> equation B
Substitute equation A in equation B
![(1)/(8)y+y=117](https://img.qammunity.org/2020/formulas/mathematics/high-school/309qwzz8ssybx6fsmcbr86qhyzfhs1x91h.png)
![(9)/(8)y=117](https://img.qammunity.org/2020/formulas/mathematics/high-school/labij2ztlm13vqhb60g2b781zqdm8919q3.png)
![y=117*8/9=\$104](https://img.qammunity.org/2020/formulas/mathematics/high-school/saw59xoeoz6chcevmftdckz0yjxmyac4fz.png)
Find the value of x
![x=(1)/(8)(104)=\$13](https://img.qammunity.org/2020/formulas/mathematics/high-school/x8di4emkh4pcgwbx726wrvm84qn81jxn6y.png)