Nina's school is 3 miles north of her house and the library is 5 miles west. If Nina walks directly from her school to the library, what is the distance between the two places?

10 miles

Step-by-step explanation:

her house to school= 3+5=8 then I added two extra miles because 8+2=10

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