Answer:
Step-by-step explanation:

A.B = A × B

Dimension of the resultant matrix is (3 × 3)
Answer: 
Step-by-step explanation:
You are ending by proving
and
are supplementary, so right before that, you need to prove their measures add to 180 degrees.
Answer:
1/5
Step-by-step explanation:
Answer:
27900
Step-by-step explanation:
15000 × (3.1/100) × 12 ×5 = 27900