Step-by-step explanation:
step 1. The square matrices are C and D.
step 2. If you add up the top rows you get 2, 8, -4 .
step 3. The answer is B.
It helps to draw a picture.
Answer:
91
Step-by-step explanation:
for a 2-digit number the tens digit (x) is 8 more than the ones digit (y) and no number is zero
=> x = y+8
x < 10
y > 0
y = 1 and x = 1 + 8 =9
the 2-digit is 91
A is congruent to X
B is congruent to Z
C is congruent to Y
AB is congruent to XZ
AC is congruent to XY
BC is congruent to ZY
ABC is congruent to XZY