SOLUTION: pat designed a patio consisting of 16 rows of congruent slate tiles. the number of tiles in the rows form an arithmetic sequence. the first row contains 15 tiles and the last row c

SOLUTION: pat designed a patio consisting of 16 rows of congruent slate tiles. the number of tiles in the rows form an arithmetic sequence. the first row contains 15 tiles and the last row c

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Question 860707: pat designed a patio consisting of 16 rows of congruent slate tiles. the number of tiles in the rows form an arithmetic sequence. the first row contains 15 tiles and the last row contains 30 tiles. how many tiles are used in the deck?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
S = �(a1 + an)n
S = �(15 + 30)16
S=8*45
s=360
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