Which two expressions are equivalent?
a 5 - 4 + x and 5 .X + 4
b.2.X + 6 and 2. (x + 6)
0.X + (6 - 4) and (x + 6) - 4
d. 513 + x) and 5.3 +5.X

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

-2 is the right

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it