If b is a rational number, and x + b is rational, what must be true about x?

What is the ratio if counted 14 robins out of 150

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?