Answer:
C: √768
Step-by-step explanation:
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If x is the age of S
And y is the age of K
So we have x=y+3
And the second equation is x-3 + 2/3)y = 12
We have to solve the system
x-y=3
x+2/3y=15
we find x=10.2 and y=7.2
<span>so Katie is 7 </span>
The answer
is ..................................b.3