Currently, Trevon is three times as old as Janice. In four years, the sum of their ages will be 48. If Janice's current age is represented by n, which of the following equations could be used to correctly solve for n?

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

35x 3= 105

step-by-step explanation:

35+35= 70   70 + 35= 105