Answer:
A
Step-by-step explanation:
This is from the definition of an inverse matrix. Always will be 1 when multiplied.
This is the concept of combinations, the solution to our question will be:
The number of combinations of 12 things take 2 at a time is
12C2
=(12!)/[(12-2)!2!]
=(12!)/(10!*2!)
=12*11/2
=66
Answer: 66
Answer:
18.8947368
Step-by-step explanation:
Answer:
2/35
Step-by-step explanation:
original equation:q+1/7=1/5
subtract both sides by 1/7
q=1/5-1/7
q=2/35
(give me brainly pls)
