A - b is NOT always natural. Eg 4 - 7 = -3 therefore not in the natural number set.
ab is always natural
a/b is NOT always natural. Eg 4/7
So the answer to the question is (b) only II must be a natural number answer.
What is the question here?
9514 1404 393
Answer:
10
Step-by-step explanation:
The total earnings for X visits by plumber X and Y hours worked by plumber Y is ...
41X +46Y = total earnings
41X +46(7) = 732 . . . . . for the given values
41X = 410 . . . . . . . . . . . subtract 322
X = 10 . . . . . . . . . . . . . . divide by 41
Plumber X made 10 visits.