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igor_vitrenko [27]
3 years ago
15

1.If 70% is £14, what is the full cost

Mathematics
1 answer:
Artist 52 [7]3 years ago
5 0
1) £20
2) 18/4 * 7 = 31,5msquared
3) X= (3-1)/5 = 2/5 = 0.4
4) A(n) = 2 + 5n
5) t(3) = 6*3 + 2 = 20
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We are effectively looking for a and b such that 5, a, b, 135 is a geometric sequence.

This sequence has common ratio <span><span>3<span>√<span>1355</span></span></span>=3</span>, hence <span>a=15</span> and <span>b=45</span>

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In a geometric sequence, each intermediate term is the geometric mean of the term before it and the term after it.

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