I have a program in Math that I can't do ,can any body help me and I'll be very grateful to him.The program is:How to use Code written in C++ to write matrices/matrix/array in Math with 4th degree by the inverse matrix solution or Cramer way to solution?Thank You.

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this question is related to windows programming using VC++

you are tasked by your teacher to help her in the computation of your grade for preliminary period. the grade will computed based on the following formula.CRA=summation of all the quizzes, recitation,board works,assignments,and other requirements.prelim grade= (Cra*2+major exam)*60+40(total CRA)*2+major examthe program will return a letter grade based on the given conditionsletter grade score...

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In the below program ,in function add() node * q is local but it acts as static ie I mean it works correctly how is it possible?#includeusing namespace std;class ll{public: struct node{ int data; node *link; }*p;ll(){p=NULL;}int add(int x){ node *q,*r;if(p==NULL){ r=new node; r->data=x; r->link=NULL;q=r; p=q;}else{r=new node;r->data=x;r->link=NULL;q->link=r;q=q->link;}return 0;}void display(){...

In the below prog,node * q is local to a function add() but it acts as static .how?#includeusing namespace std;class ll{public: struct node{ int data; node *link; }*p;ll(){p=NULL;}int add(int x){ node *q,*r;if(p==NULL){ r=new node; r->data=x; r->link=NULL;q=r; p=q;}else{r=new node;r->data=x;r->link=NULL;q->link=r;q=q->link;}return 0;}void display(){ node *q; q=p;while(q!=NULL){cout