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krok68 [10]
3 years ago
6

Geometry (16)

Mathematics
2 answers:
timurjin [86]3 years ago
6 0

Answer:  The required compound inequality is 3

Step-by-step explanation:  We are given that the lengths of the sides of a sandbox are 9 ft, 6 ft and n ft.

We are to write a compound inequality that describes all possible lengths of n.

Since the sandbox has three sides, so it must be a triangle.

Also, we know that the sum of the lengths of any two sides of a triangle is always greater than the length of the third side.

So, we have

9+6>n\\\\\Rightarrow 15>n\\\\\Rightarrow n

6+n>9\\\\\Rightarrow n>9-6\\\\\Rightarrow n>3~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)

and

9+n>6\\\\\Rightarrow n>6-9\\\\\Rightarrow n>-3~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(iii)

Combining inequalities (i), (ii) and (iii), we get

3

Thus, the required compound inequality is 3

Daniel [21]3 years ago
4 0
A = 9 and b = 6 are the two given sides

The third missing side n can be described through the following inequality
a-b < n < a+b
where a > b ('a' is larger than b)
This is the triangle inequality theorem

So,
a-b < n < a+b
9-6 < n < 9+6
3 < n < 15

Answer: 3 < n < 15
(which means you can pick any number from 3 to 15 for n. You cannot pick 3. You cannot pick 15)<span />
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