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3 years ago

Write down a 3-digit number where digits are in decreasing order. Reverse the digits and subtract it from the first number.

Mathematics

1 answer:

Alla [95]3 years ago

8 0

Step-by-step explanation:

987 → 789

987 - 789 = 198

876 → 678

876 - 678 = 198

765 → 567

765 - 567 = 198

654 → 456

654 - 456 = 198

543 → 345

543 - 345 = 198

432 → 234

432 - 234 = 198

321 → 123

321 - 123 = 198

Generally it is always like that:

3 ≤ x ≤ 9

100x + 10(x-1) + (x - 2) → 100(x - 2) + 10(x - 1) + x

(100x + 10(x - 1) + (x - 2)) - (100(x-2) + 10(x-1) + x)

= 100x + 10(x - 1) + (x - 2) - 100(x - 2) - 10(x - 1) - x <em>cancel 10(x - 1)</em>

= 100x + x - 2 - 100x + 200 - x <em>cancel 100x and x</em>

= 100 - 2

= 198

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Find the slope of the line through the given points. d (3, 7) and (3, −8)

Romashka [77]

Answer:

Undefined

Step-by-step explanation:

Use rise over run (y2 - y1) / (x2 - x1), where (x1, y1) and (y1, y2) are points on the line

Plug in the given points:

(y2 - y1) / (x2 - x1)

(-8 - 7) / (3 - 3)

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= undefined

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3 years ago

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3 years ago

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sineoko [7]

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Explanation

You times a the number shy three then add one

4 0

2 years ago

For a set of five whole numbers, the mean is 4, the mode is 1, and the median is 5. What are the five numbers?

zmey [24]

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3 years ago

The nth term of a sequence is 3n + 2

gavmur [86]

Answer:

see explanation

Step-by-step explanation:

To calculate the first 3 terms substitute n = 1, 2, 3 into the n th term rule

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