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Sati [7]
3 years ago
12

X + 9y = 8 x − 4y = –18

Mathematics
1 answer:
loris [4]3 years ago
5 0

Step-by-step explanation:

x + 9y =  - 18 \\ 8x - 4y =  - 18 \\ x =  - 18 - 9y \\ 8( - 18 - 9y) - 4y =  - 18 \\  - 144 - 72y - 4y =  - 18 \\  - 76y = 126 \\ y =  - 1.66 \\

x =  - 18 - 9y \\ x =  - 18 - 9( - 1.66) \\ x =  - 18 + 14.94 \\ x =  - 3.06

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The sum of the sequence of 685+678+671+664+...+6
lukranit [14]

Answer:

Sum of the sequence (Sn) = 33,859

Step-by-step explanation:

Given:

Sequence = 685+678+671+664+...+6

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Sum of the sequence (Sn)

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a = 685

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4 years ago
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What is the answer 47 * 63
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<h3>47 × 63 = <u>2961</u></h3>

<h3>... Hope this will help... </h3>

<h3>U can also verify the answer using a calculator </h3>
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