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sergeinik [125]
3 years ago
12

In how many ways can aling rosa arrange 6 potted plants in a row?

Mathematics
2 answers:
horsena [70]3 years ago
3 0
6 potted plants can be arranged 720 different ways.
Nezavi [6.7K]3 years ago
3 0

Consider <u>6 potted plants</u> that you are going to <u>arrange in a row</u>. You can choose first plant in 6 ways (one plant from 6 given), then 5 plants left to be arranged. The second plant can be chosen in 5 ways (one plant from remaining 5) and after you arrange the second plant, only 4 plants left. The third plant you can choose in 4 ways (one plant from remaining 4) and after this procedure only 3 plants left. The fourth plant you can choose in 3 ways (one plant from remaining 3) and only 2 plants left. The fifth plant you can choose in two ways and the last one is determined by the 5 previous.

Then the number of ways to arrange 6 potted plants in a row is

6\cdot 5\cdot 4\cdot 3\cdot 2\cdot 1=6!=720\ ways.

Answer: 720 ways

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<em>Additional comment</em>

If you clear fractions by multiplying each equation by xy, the problem becomes one of solving simultaneous 2nd-degree equations. It is much easier to consider this a system of linear equations, where the variable is 1/x or 1/y. Solving for the values of those gives you the values of x and y.

A graph of the original equations gives you an extraneous solution of (x, y) = (0, 0) along with the real solution (x, y) = (0.5, -1).

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