7. C
8.A. sqrt(144)
^^^^^^^^^^^^^^^^^^
Convert them to have the same denominator then subtract
Sorry I thought I was gonna understand but I don’t but good luck:) you can do it
7 7/9 clergs.
wergs= w
nergs= n
clergs= c
3w= 4n, so 5w= 6 2/3n
Since 6n=7c, then 6 2/3n= 7 7/9n
Hope that answered your question!!