A man buys a coat in a sale marked with a 15% discount. He paid £157 for the coat. How much would it have cost before the discount?

185

Step-by-step explanation:

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10010010001010010101001001010010100101010010101010010010101010110010001011010010010001

step-by-step explanation:

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2