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This is really confusing

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

Kevin is an insurance salesman. when he sells a policy, he makes 20 percent of the policy premium (p) up front; then each year the policy is active, he receives 15 percent of the original premium. which equation could be used to figure his total commission on a policy that has been active for five years? c=0.80p c=0.20p + 0.15p c=0.35p + 4(0.15) c=0.95p

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?