Matrix multiplication

There are 2 families A and B. There are 4 men, 6 women and 2 children is family A, and 2 men, 2 women and 4 children in family B. The recommend daily amount of calories is 2400 for men, 1900 for women, 1800 for children and 45 grams of proteins for men, 55 grams for women and 33 grams for children. Represent the above information using matrix. Using matrix multiplication, calculate the total requirement for calories and proteins for each of the two families. What awareness can you create among people about the planned diet from this question?

There are 2 families A and B. There are 4 men, 6 women and 2 children in family A, and 2 men, 2 women 4 children in family B. The recommend daily amount of calories is 2400 for men, 1900 for women, 1800 for children and 45 grams of proteins for men, 55 grams for women and 33 grams for children. Represent the above information using matrix. Using matrix multiplication, calculate the total requirement of calories and proteins for each of the two families. What awareness can you create among people about the planned diet from this question?

In a certain city there are 30 colleges. Each college has 15 peons, 6 clerks, 1 typist and 1 section officer. Express the given information as a column matrix. Using scalar multiplication, find the total number of posts of each kind in all the colleges.

In a certain city there are 30 colleges. Each college has 15 peons, 6 clerks, 1 typist and 1 section officer. Express the given information as a column matrix. Using scalar multiplication, find the total number of posts of each kind in all the colleges.

If A is a diagonal matrix of order 3xx3 is commutative with every square matrix of order 3xx3 under multiplication and trace (A)=12, then find |A|

If A is a diagonal matrix of order 3xx3 is commutative with every square matrix or order 3xx3 under multiplication and t r(A)=12 , then the value of |A|^(1//2) is ______.

Evaluate the following using properties for multiplication to simplify the multiplication. (-59) times 102

Evaluate the following using properties for multiplication to simplify the multiplication. 28 times (-48)

Evaluate the following using properties for multiplication to simplify the multiplication. 33 times 12

Multiplicative inverse of the matrix [[2,1],[7,4]] is (i) [[4,-1],[-7,-2]] (ii) [[-4,-1],[7,-2]] (iii) [[4,-1],[7,2]] (iv) [[4,-1],[-7,2]]