If X - A = B, what is X?

The answer to your question is: the first option is correct

Step-by-step explanation:

We know that X - A = B  , then   X = A + B

          A      2        -7               B     -9       5

                   6         1                        1       -1      

X will be the sum of the two matrix given

X    =                A        +         B                  =    

                     2 - 9             -7 + 5                       -7         -2

                     6 +1               1 - 1                           7          0

x=  -7      -2

      7       0

Step-by-step explanation:

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94

b, i believe, but not sure.