What is the value of d21+d22+d23 given the matrix equation below?

Using arithmetic operation, the missing row values of the matrix are 11, -10 and 7 respectively. Hence, the sum gives a value of 8

d21, d22, d23 refers to the values in the 2nd row of the matrix D.

Using the arithmetic operation to evaluate each value :

d21 + (-3) = 8

d21 - 3 = 8

d21 = 8 + 3

d21 = 11

d22 + 9 = - 1

d22 = - 1 - 9

d22 = - 10

d23 + (-7) = 0

d23 - 7 = 0

d23 = 0 + 7

d23 = 7

Therefore, the sum of d21, d22 and d23 is (11 + (-10) + 7) = 8

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