SOLUTION: if the average of x,y,z and 60 is 75, then the average of (x-17) , (y+30) and (z-13) is 1) 80 2) 75 3) 70 4) 65

Algebra ->  Average -> SOLUTION: if the average of x,y,z and 60 is 75, then the average of (x-17) , (y+30) and (z-13) is 1) 80 2) 75 3) 70 4) 65       Log On


   

Question 836382: if the average of x,y,z and 60 is 75, then the average of (x-17) , (y+30) and (z-13) is
1) 80
2) 75
3) 70
4) 65
Answer by reviewermath(1029) About Me  (Show Source):
You can put this solution on YOUR website!
Q:
If the average of x,y,z and 60 is 75, then the average of (x-17) , (y+30) and (z-13) is
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A:
%28x+%2B+y+%2B+z+%2B+60%29%2F4+=+75 --> x + y + z = 240
%28%28x-17%29+%2B+%28y+%2B+30%29+%2B+%28z+-+13%29%29%2F3 = %28x+%2B+y+%2B+z%29%2F3+%2B+%28-17+%2B+30+-+13%29%2F3
= 240%2F3+%2B+0
=highlight%2880%29