-2x + 5y =1 7x – 10y = -11
If (x, y) is a solution to the system of equations above, what is the sum of x and y?

you can sum the 2 equations or suppose-10y=-7x-11

then you can get it it in the other one

step by step

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

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation: