Step-by-step explanation:
the sequence is arithmetic due to the common difference that is equal
d=11-15=7-11=-4
a(n) = a1 +(n-1)d
a1=15
Then :
a(n) = 15+(n-1)-4
hope this helps
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Graph A.....parallel lines will have no solution because they never intersect
The answer is 1/500 because it will always be the probability of the event occurring/total events