Asum of money is shared among nine people on that the first gets $75 the next $150and the next $225 .
A)how much money does the ninth person get
B)how much money is shared altogether
assuming a constant difference for all, you have an AP with
a = 75
d = 75
(a) a_9 = 75 + 8*75 = ____
(b) S9 = 9/2 (2*75 + 8*75) = _____