I just solved it and I'm pretty sure its only one solution, I took the bottom equation multiplied it by -3 then i canceled out the equations and got 9. So that would make it C.
To find Interquartile rage you subtract quartile 1 from quartile 3
Answer: I think its D
Explanation:I sort of made a coordinate graph
I am sorry, I would love to help but I am not sure. Good luck anyways. :(