There are two types of tables in the restaurant, the square table can seat 4 people, and the round t

1<=4x+9y<=100, x>=1, y>=1 to solve the system of equations, 4x+9y is the number of fortunes.

Solution: According to the question, it is necessary to find the number of natural numbers that can be divisible by (4x+9y) from 1 to 100, (x and y are both integers greater than or equal to 0 and less than 100).

4 4 = 16 = 4k, 9 2 = 18 = 4k + 2 (k is a natural number) is divisible by (4x+9y).

Even numbers greater than 16 are divisible by (4x+9y), and even numbers that are not divisible by (4x+9y) are only:

4 in total. 9+16=25=4k+1,9 3=27=4k-1 (k is a natural number) is divisible by (4x+9y), and the odd number that is not divisible by (4x+9y) is only:

There are 8 in total, and a total of 12 numbers are not divisible by (4x+9y), that is, there are 100-12=88 (pieces) in the number of fortunes, so the answer is: 88

If you are a subordinate of a restaurant manager.

Listen to him as much as he wants.

If you are an investor.

Find the right restaurant manager.

Stir up the current one.

Competencies that a restaurant manager should have.

1.Analysis of the current operating conditions.

2.Scientific solutions to improve performance.

The solution to this problem should be.

Analyze the structure of your customers.

Statistics based on the actual situation.

Calculate the maximum rate of return on the number of square tables and round tables.

And when he was fired.

Let him know why he was fired.

Hopefully he'll be down to earth.

Maybe it's a help to him.

Good luck.

For this resolution.

Numbers up to 100 are divided into four categories, divided by 4

0 more than 1 more than 2 more 3

For the satisfaction of the condition - a natural number number that can be expressed as 4x+9y, the condition in these four categories is specialized as:

Remainder 0: any

remainder 1:>=9 (excluede 1,5)remainder 2:>=18 (excluede 2,6,10,14)remainder 3:

=27 (excluede 3,7,11,15,19,23) so the number that satisfies the condition is 100-2-4-6 = 88,

I don't know, I've heard of a saying called "7 wins, 8 losses", "7 up, 8 down"...