-1/4 + 3/4a = -( -7/4a - 1)

a=-5/4

Step-by-step explanation:

-1/4+3/4a=7/4a+1

-1+3a=7a+4

3a-7a=4+1

-4a=5

a=-5/4

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

c

-by-step explanation:

it would be c