PLEASE ANSWER & EXPLAIN *****100 POINTS******

Answer: B
Step-by-step explanation:
line 1: 10
line 2: 9
line 3: 8
line 4: 7
line 5: 6
line 6: 5
Answer:
Step-by-step explanation:
Given the first line has 10 marbles and each following line has one less, the general equation is the nth line will have 10-(n-1) marbles.
So the sixth line has 10-(6-1) = 5 marbles.