CAN SOMEONE HELP ME PLEASE!

Mathematics

1 answer:

IRISSAK [1]3 years ago

5 0

The screens to blurry, you can’t understand the words

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How can I reduce 60/1000 into simplest form?

ozzi

3/50 because the greatest common factor is 20

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3 years ago

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the cost of making article is divided between material, labour and overhead in ratio 3:4:5 if cost of material is 33.60 then cos

iragen [17]

Cost of material labour & overheads is in the ratio 0f 3:4:5
if cost of material = 33.60
cost of labour = 4/3* 33.60 = 44.8
cost of material = 5/3 * 33.60 = 56
cost of article = 33.60+ 44-8 + 56 = 134.4

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3 years ago

What is the sum of the arithmetic sequence 3, 9, 15..., if there are 24 terms? (5 points)

Vinil7 [7]

There's a fixed difference of 6 between terms (9 - 3 = 6, 15 - 9 = 6, and so on). The first term of the sequence is 3, so the $n$ -th term is

$3 + 6(n-1) = 6n - 3$

If there are 24 terms in the sum, then the last term is 6×23 - 3 = 135.

Let $S$ be the sum,

$S = 3 + 9 + 15 + \cdots + 123 + 129 + 135$

Reverse the order of terms:

$S = 135 + 129 + 123 + \cdots + 15 + 9 + 3$

If we add up the terms in the same positions, we get twice $S$ on the left side, while on the right side we observe that each pair of terms will sum to 138.

$S + S = (3 + 135) + (9 + 129) + (15 + 123) + \cdots + (135 + 3)$