First page , second image is the correct answer :)
<span>Subtraction exhibit a property of closure over the set of real numbers because if you subtract two numbers from the real numbers set, the result will still be a real number.
Example:
Let RS be a set of real numbers.
RS = {1, 2, 3}
Suppose I get 3 and subtract 1, 3 - 1, the result is 2 which is a real number. We can try a non-commutative 1 - 3 and yet it will still give us a real number which is -2.
</span><span>Subtraction is non-commutative because if we interchange numbers in subtraction, the result will either be positive or negative.
Example:
3 - 1 = 2. The answer is 2; but we can not say this is true for 1 - 3 because it will yield -2.
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Answer:
The third option
Step-by-step explanation:
Since the function is a constant function, all labeled points will have the same slope
If a number is 40% more than another number, we can say that the new number is equivalent to the sum of the old number and 40% of the old number. Let's try to represent this as an equation. First, let's convert the percentage to a fraction:

Defining
as the new number and
as the old number, we can say:

Also, we can say:

To solve, let's substitute the first equation into the second equation for
and simplify.


- Get terms over common denominator



We now have found the old number. Using the second equation we found near the beginning, let's find
.


The numbers are 35 and 49.