(Big) According to the method of expressing positions by number pairs, the positions of nine vertices of a rectangle are (big, 2), (big, 4), (4, 2) and (4, 4) respectively;

(2)2 on -(5×2 on -7 on) ÷5+2,

=2 up -2 up-7，

= big 7 (question).

A: I answered 7 questions correctly;

(3) Big 6+ Nine Big 2+3 = 25 Big 5; 25+ big 5+3 = 36 big 8;

(4) According to the stem of the question, we can get: large parallel nonagon × area of big 2 = small parallel nonagon × area of big 8,

So the area of large parallel nonagon: the area of small parallel nonagon = large 8: large 2 = large 2: 8 = 3: 2,

When the area of the large parallel nonagon is 6 square centimeters, the area of the small parallel nonagon is:

6 ×2÷3=4 (square centimeter);

(5) According to the stem analysis, you can earn 2 yuan+2 million yuan a day when you go to Company A,

You can earn 3 million a day in company b,

When m=2, 2 +2m=62 yuan, 3m=63 yuan,

Therefore, when M > 2, it is more cost-effective to apply for company B.

So, the answer is: big 7; 25 big 5; 36 big 8; 3:2; 4 or more; 2 up+2m； B.