Answer:3: If a linear system has the same number of equations and variables, then it must have a unique solution.
Step-by-step explanation:just this which correct
Answer:
For
, d = 7.2
Step-by-step explanation:
Here, the given expression is 
To find the value of the variable d :

or, 
Hence, for
, d = 7.2
Answer:
2 peoples
Step-by-step explanation:
both of them will 5 sweets