John had 300 stamps. he sold 120 stamps and gave 1/3 of the rest to his brother. A - how many did he give to his brother?
b- how many stamps did he have left?

2.Mrs gray bought some eggs. she boiled 1/2 of them and poached 1/4 of the remainder. she had 9 eggs left. how many did she buy?

3. Rosa read 10 pages of a book on monday. she read 1/3 of the remainder on tuesday. if she had 24 pages to read, how many pagese were in the book??

step-by-step explanation:

i think you should think about the question and not look online.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

42

step-by-step explanation: