3. Each Matrix is the individual athlete. The total of each matrix would be the athletes total score. Adding all the matrix together would get you the total team score.
The answer is A.
4. Add each number in the first with the corresponding number in the second.
5 + -7 = -2, 7+4 = 11, 3+2 =5
-1 + 1 = 0, 0+-2 = -2, -4 +-3 = -7
The answer is B.
5.
Y - 5 = 1 Y = 6, Y -7 = 0, Y = 7, Y -3 =1, Y = 4
Y - -1 = 0, y = -1, Y - 0 = 1, Y = 1, Y - -4 = 4, Y = -4
The answer is B.