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ale4655 [162]
3 years ago
8

True or False?

Mathematics
1 answer:
neonofarm [45]3 years ago
7 0
FALSE!\\The\ segments\ below\ couldn't\ form\ a\ triangle.\\\\a,b,c-lengths\ sides\ of\ a\ triangle,\ then:\\\\a+b > c\\a+c > b\\b+c > c\\\\Here:a=9;\ b=4;\ c=15\\\\a+b=9+4=13 < 15!!!!
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Help meeeeeeeeeeeeedsddsss9
Sedaia [141]

Answer:

2(x + 3) <9

Step-by-step explanation:

<u>Two times</u> the <em>quantity of a number increased by 3</em> is <u>less than 9</u>

       2  ·                                          (x + 3   )                           < 9    

     = 2(x + 3) <9

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Five-sixths of the boats in the marina are white, 2 5 of the remaining boats are blue, and the rest are red. If there are 12 red
Inga [223]

Answer: There are 120 boats in the marina.

Step-by-step explanation:

Let's suppose that there are N boats

We know that 5/6 of them are white, then we have: (5/6)*N white boats.

The remaining is: N - (5/6)*N = (1/6)*N

We know that 2/5 of the remaining are blue, then we have:

(2/5)*(1/6)*N blue boats

And the rest are red, the rest is:

(1/6)*N - (2/5)*(1/6)*N = (3/5)*(1/6)*N

Then we have (3/5)*(1/6)*N red boats.

And we know that there are 12 red boats, then:

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N = 12*(6)*(5/3) = 120

There are 120 boats in the marina.

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