0.2857
0.4286
.7
105
The smallest number into which both 7 and 15 can be divided evenly is 105.
No it is a whole number so it cannot be irrational.
-7 is a rational number
8
8
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.