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OLga [1]
3 years ago
6

A set of 3 consecutive integers has a sum of 30. Which integers are they?

Mathematics
2 answers:
riadik2000 [5.3K]3 years ago
8 0
You can only do it like '7.5 plus 9.5 plus 13
Goshia [24]3 years ago
5 0
Since consecutive means they're one away from each other, the 3 integers can be written like this:

x
x + 1
x +2

So, we add all of these together to find x:
x + x + 1 + x + 2= 30
3x + 3 = 30
3x = 27
x = 9

This then means the numbers are 9, 10, and 11
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Answer: 60480

Step-by-step explanation:

Given : The number of empty seats in a theater = 9

The number of customers need to find places to sit =6

Since order matters here, so we use permutations

The permutations of n things taking r at a time is given by :-

^nP_r=\dfrac{n!}{(n-r)!}

Then, the number of ways to arrange 6 seat in 9 seats :-

^9P_6=\dfrac{9!}{(9-6)!}=\dfrac{9\times8\times7\times6\times5\times4\times3!}{3!}\\\\=60480

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3 0
3 years ago
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liraira [26]

Answer:

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Step-by-step explanation:

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x =  \frac{ - b +  -  \sqrt{ {b}^{2} - 4ac } }{2a}

x=[-(-6)+sqrt.(-6)^2-4(1)(-9)]/2(1)

×=[6+sqrt.72]/2

×=7.2inches

×=[-(-6)+sqrt.(-6)^2-4(1)(-9)]/2(1)

x=[6-sqrt.72]/2

×=-1.2(rej)

(PS. sqrt is square root)

(Correct me if i am wrong)

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Step-by-step explanation:

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