Question: arithmatical sequences 2. A child makes a pattern with blocks on the floor. She puts 55 blocks in the first row, 50 in the second,

arithmatical sequences

2. A child makes a pattern with blocks on the floor. She puts 55 blocks in the first row, 50 in the second, 45 in the third and so on. a Write down an expression for the number of blocks in the nth row. b Determine the number of blocks in the 7th row. c Determine the total number of blocks in the first five rows. d How many rows can she have in her pattern if she has 300 blocks to play with

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