Using number sets, it is found that the correct classification of the number is:
C. rational number, integer, whole number, natural number , real number.
Numbers are classified as:
- Whole, which is all positive numbers and zero, also called natural.
- Integers, which is the set of whole numbers plus negatives.
- Rational, which is the set of integer numbers plus terminating or repeating decimals.
- Irrational, which are non terminating decimals.
- Real, which are the sum of rational and irrational.
In this problem, the number given is:
- Which is a whole(natural) number, thus it is also integer, rational and real, and the correct option is C.
A similar problem is given at brainly.com/question/10814303
Geometry helps people understand life u are short and don’t know how life helps u
Answer: 
Step-by-step explanation:
The first step is to make the division of the fractions 
and
. To do this, you can flip the fraction over and multiply the numerators and the denominators of the fractions. Then:
Reduce the fraction 
:
Now you can make the subtraction: in this case the Least Common Denominator (LCD) will be the multiplication of the denominators. Divide each denominator by the LCD and multiply this quotient by the corresponding numerator and then subtract the products. Therefore you get:
Step-by-step explanation:
Sale price
= Marked down by 10% from selling price
= 90% of selling price
= 0.9 * $600
= $540.
Sale price - Cost price
= $540 - $450 = $90.
The markup from cost to sale is $90.
Let's see what the options look like when we multiply the expressions in brackets:
(first, i multiply both parts of the second bracked by the first part of the first bracket, and then the same with the second part of the first bracket:
<span>(1) (3x - 3)(x - 2))
3x2 +6x -3x +6// this is not correct
(2) (3x + 3)(x - 2) </span>
3x2-6x+3x-6//this is not correct
(3)
3(x + 1)(x - 2)
3(x2-2x+x-2)//simplifying:
3(x2-x-2)//multiplying:
3x2-3x-6)
- so this is not correct either
(4) 3(x - 1)(x - 2)
3(x2-2x - x + 2)
3(x2-3x +2)
3x2-9x +6 - well, here is our winner!
