No it is a whole number so it cannot be irrational.
-7 is a rational number
You wont be able to add a rational number and an irrational number and get a number not in a fraction ( 3 + 22/7) (21/7 + 22/7 = 43/7) So, yes as you see in the example above it made another irrational number.
No.
Yes - if I had an irrational number x, and I added that to the number (7-x), I would end up with 7.If the number is irrational, it can be subtracted from a rational/integer to make another irrational.
+sqrt(47) is one possible answer.
It is a irrational number. Because the square root of every imperfect square is irrational number.
Every irrational number, when multiplied by 0.4 will produce an irrational number.
7 is rational.
No because 7 squared equals 49 which is a rational number but the square root of 7 is an irrational number
It is a rational number. One way this can be proved is that it can be represented as a fraction: 7/2.
7 is a rational number. There is no other number in 7 and so the question has no sensible answer.