Answer:
the sum of two rational number is minus 4 by know if one of them is 13 by 6 them find the other
Explanation:
let the second rational no. be x
then a/q,
13/6 + x = -4/9
x = -4/9 - 13/6
x = (-16 - 78)/36
x = - 94/36 or -47/18
x = -2.61111
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