Sophie earns $7 an hour babysitting and $8 an hour for cleaning the house last week she babysat for 3 hours and cleaned for 2 ho
urs how much did sophie earn last week
1 answer:
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Answer:
Step-by-step explanation:
Given that When n is divided by 21, the remainder is an odd number.
i.e. where m is an integer and k a positive integer <21
When n is divided by 28, the remainder is 3
, where c is a positive integer
This can be written as
Since n is giving odd remainder when divided by 21,
we get r =3 as n is a multiple of 7 +3