Mathematics
cristivargas
2021-04-08 08:32:12
If x + y = 9, z + y = 12, and z + x = 11, what is the average (arithmetic mean) of x, y and z?
ANSWERS
Leslee452
2021-04-08 10:37:19

[latex]x+y=9 \ z + y = 12 \ z + x = 11 \ x+y+ z + y+ z + x=9+12+11 \ 2x+2y+ 2z=32 \ x+y+ z=16 [/latex]

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