Why are all 4-digit Fredholl numbers composite?
1 answer:
Fredholl numbers are number, which have 2 different digits, equal number of each one, and zero cannot be the first digit. Some examples of fredholl numbers are: 355533 and 4141.
233233, 535351 or 055050 are not fredholl numbers.
In case of 4 digit numbers let's look at the possible forms of Fredholl numbers:
They have to be one of the following: xxyy, xyxy, xyyx
We can write above numbers as:
All 4-digit Fredholl numbers are composite because they will be divisible by either 11 or 101.
233233, 535351 or 055050 are not fredholl numbers.
In case of 4 digit numbers let's look at the possible forms of Fredholl numbers:
They have to be one of the following: xxyy, xyxy, xyyx
We can write above numbers as:
All 4-digit Fredholl numbers are composite because they will be divisible by either 11 or 101.
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Answer:
The number of child tickets sold was 75 and the number of adult tickets sold was 97
Step-by-step explanation:
<u><em>The correct question is</em></u>
At the movie theater child admission is $6.30 an adult admission is $9.60 on Wednesday 172 tickets were sold for a total sales of $1403.70 How many child tickets and adult tickets were sold that day?
Let
x ----> number of child tickets sold
y ----> number of adult tickets sold
we know that
----> equation A
-----> equation B
Solve the system by graphing
Remember that the solution of the system is the intersection point both lines
Using a graphing tool
The intersection point is (75,97)
see the attached figure
therefore
The number of child tickets sold was 75 and the number of adult tickets sold was 97
