When the British system of units was first developed, what was the most
common object used as a basis for measuring length?
A. The human body

B. Automobiles

c. The king's castle
D. Animals

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,