Mathematics, 09.06.2020 17:57, BaileyElizabethRay

If x + y is rational, must x and y each be rational? A)Yes; because the sum of rationals is rational.
B)No; because the sum of irrationals is always irrational.
C)No; because x and y could be additive inverses of each other.
D)Yes; because x and y must be integers, and integers are rational.

Answers: 3

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If x + y is rational, must x and y each be rational? A)Yes; because the sum of rationals is rational. B)No; because the sum of irrationals is always irrational. C)No; because x and y could be additive inverses of each other. D)Yes; because x and y must be integers, and integers are rational.

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If x + y is rational, must x and y each be rational? A)Yes; because the sum of rationals is rational.
B)No; because the sum of irrationals is always irrational.
C)No; because x and y could be additive inverses of each other.
D)Yes; because x and y must be integers, and integers are rational.