Will give brainliest
1. seven is part of all of the following sets of numbers except
natural numbers
rational numbers
irrational numbers
integers
2. which of the following represents the additive identity?
a + 0 = a
a · 1 = a
a + b = b + a
ab = ba

1. The answer is the third option "irrational numbers." It isn't the second option because rational numbers are numbers that can be made into fractions and 7 can be made into a fraction. It isn't the fourth option because 7 is in fact a integer because it is a whole number. It isn't the first option because natural numbers are positive integers and 7 is a positive which would mean your answer is the third option.

2. The answer is the first option "a + 0 = a." The additive identity which is found by the property of addition when added to a (variable) in that set it gives away a. A variable is a letter in a expression in this case a would be the variable.

Hope this helps.

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

i agree because i see the other persons thinking is clear