A rectangular frame has width 7 in. longer than its length. What is the width of the painting if its area is 18 in?
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Answer: Consider a power set of real numbers.
The subsets of the power set are as follows:-
1. Natural number()={1,2,3,4,5,....}
2.Whole numbers={0,1,2,3,4,......}
3.Integers()={.......-3,-2,-1,0,1,2,3,....}
4.Rational numbers()=It contains all of the above subsets and fractions (where denominator ≠ 0) ,terminating and repeating decimals.
5.Irrational numbers=It contains numbers which cannot be expressed as the ratio of integers, and they are non-repeating, non-terminating decimals.
