How to create matrix and solve for answers?

Question

Danny Maefengea 2020-8-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/585794-how-to-create-matrix-and-solve-for-answers

编辑： Alan Stevens 2020-8-28

Prblm1.m

Hi friends, I was trying to solve the problem below using matrix (system of linear equations) but I couldn't get to the final answers. I have also attached a MATLAB file showing how far I got in trying to solve the problem.

Can any body please help? Thank you so much for your help.

Problem:

Using MATLAB, represent the following using matrix form and solve it.

A local theatre sold out for their show. They sold all 500 tickets for 8, 070.00. The tickets were priced at 15 for students, 12 for children, and 18 for adults. If the band sold three times as many adult tickets as children’s tickets, how many of each type was sold?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Alan Stevens 2020-8-28

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/585794-how-to-create-matrix-and-solve-for-answers#answer_486404

在 MATLAB Online 中打开

% Your equations are:
% A + S + C = 500;
% 18*A + 15*S + 12*C = 8070;
% A = 3*C;
% where A = nbr of adults, B = nbr students, C = nbr children
%
% Set these in the form 
% M*ASC = V where
% M = [1  1   1
%      18 15  12
%      1  0  -3 ]
% V = [500
%      8070
%      0   ]
% and
% ASC = [A
%        B
%        C]
%
% Using Matlab's backslash operator you can then solve for ASC
%
% ASC = M\V
% 
% Then extract values for A, S and C
% A = ASC(1); B = ASC(2); C = ASC(3);