Brushing up on my math skills 😅

I understand this is not a tutoring site but i just want to know if I solved this correctly. Plus eve has such brilliant minds on here and two heads are better than one. So I came across this problem I am just curious if I solved it correctly. Did anyone get a different answer? Write a comment whether or not we should make a tutoring group on here whether it be to sharpen up your skills or for help with school....