Answer: 192 pounds.
Step-by-step explanation:
Let x denotes the weight of Frances ( in pounds ).
Given : The ratio between Frances and Carolina's weight is 8: 7
If Carolina weighs 168 pounds, then using proportion s we have the equation below :-
[tex]\dfrac{x}{168}=\dfrac{8}{7}\\\\\Rightarrow\ x=\dfrac{8\times168}{7}\ \ \text{[Multiply 168 on both sides]}\\\\\Rightarrow\ x=8\times24=192[/tex]
Therefore, the weight of Frances = 192 pounds.