Fortune Telling Collection - Ziwei fortune-telling - Purchase in Wei Zi, Di Qing
Purchase in Wei Zi, Di Qing
Judging from the meaning of the title, 3x+5y =1300160x+200y = 56000,
X = 100y = 200。
A: I bought 100 long chairs and 200 curved chairs;
(2) If M Type A trucks are rented, 20 Type B trucks are rented.
4m+ 12(20? m)≥ 100 1 1m+7(20? m)≥200,
The solution is 15≤m≤ 17.5,
According to the meaning of the question, m is a positive integer,
So m can only be 15, 16, 17,
Therefore, there are three rental schemes for transporting these leisure chairs back at one time, which can be arranged as follows:
Scheme 1: type a 15, type b, 5,
Scheme 2: A-type trucks 16, B-type trucks 4,
Option 3: A-type trucks 17 and B-type trucks 3;
(3) If the total rent is W yuan, then W =1200m+1050 (20-m) =150m+21000.
∵ 150>0,
∴W increases with the increase of m,
∫ 15≤m≤ 17.5,
∴ When m= 15, W has a minimum value, and W is the minimum value =150×15+21000 = 23250.
The most economical car rental scheme is to rent 15 A truck and 5 B truck, and the minimum freight is 23250 yuan.
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