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muminat
3 years ago
10

Angelika thought of a number N, multiplied it by 7 and added 9. Then she told the result Rto Lisa.

Mathematics
1 answer:
Sphinxa [80]3 years ago
6 0

Answer:

R=7n+9

Step-by-step explanation:

R=(N*7)+9

R=7n+9

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elena-s [515]

Answer:

Answer for #10:

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Answer for #1:

x = 2 \: and \: y =  - 1

Step-by-step explanation:

In order to solve a simultaneous equation using the substitution method you have to:

Use one of the equation and substitute it into the other equation, in this case equation <em>B</em><em> </em>was substituted into equation <em>A</em><em>.</em>

<em>equ. \: a = (2x - 3y = 7) \\ equ. \: b = (x = 1 - y)</em>

Therefore since x = 1 - y, equation A would be:

2(1 - y) - 3y = 7 \\ (2 - 2y) - 3y = 7 \\  - 2y - 3y = 7 - 2 \\  - 5y = 5 \\ y =  - 1 \: and \: x = 2

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Answer:

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3 years ago
A map has a scale of 2 inches : 25 miles. Chandra uses the map to find the distance from the zoo to her house. The distance on t
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Step-by-step explanation:

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Taya2010 [7]

Answer:

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Step-by-step explanation:

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Ratling [72]
X=52 (vertically opposite angles)
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Read 2 more answers
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