3x + 20 = 40 + 40
3x = 60
X = 20
V + 71 = 107
V = 36
D because there are 8 outcomes
Answer:
5
Step-by-step explanation:
Remember, the rank of a matrix is the number of pivots or number of rows different of zero in the echelon form of the matrix.
Then, if A is a matrix
the maximum number of pivots that can have is one by row, that is, 5.
Then the maximum rank that A can have is 5.
D. the county collects donations to build a fountain in city hall.