Question

Please I need your help, if i get wrong will get f in class, just one question

Answer 1

(D) 56

Explanation:

x/y = 2/7

x = 2/7 y

S = x + y

S = 2/7 y + y

S = 9/7 y

y is a multiple of 7, so S is a multiple of 9.

So S cannot be 56.