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Cerrena [4.2K]
2 years ago
14

The middle person in a row is the 18th, how many persons are in the row?

Mathematics
2 answers:
Iteru [2.4K]2 years ago
5 0

Answer:

36

Step-by-step explanation:

if 18 is the middle there are 17 on each side of that person so 17+17+1=36

Alex17521 [72]2 years ago
3 0

Answer:

35

Step-by-step explanation:

You have 17 either side to make 18 the middle e.g if 2 was the middle then you have 1 either side.

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Write this number in expanded form in the box below. Use powers of ten in your answer.
yarga [219]

Answer:

3000+400+30+9+0.30+0.06, very simple

Step-by-step explanation:

no need

5 0
2 years ago
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Prove the polynomial identity.
Kaylis [27]

Answer:

Proven

Step-by-step explanation:

We prove the polynomial with factorization. We must first simplify the expression before we can factorize:

(4\cdot{x^2}-2)\cdot{(4\cdot{x^2}-2)}-16\cdot{x^4}

16\cdot{x^4}-8\cdot{x^2}-8\cdot{x^2}+4-16\cdot{x^4}

4-16\cdot{x^2}

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We can factorize further with the x term being zero. For this to be true we must have -2x and 2x to cancel out and therefore the expression is proven:

4\cdot{(1-2\cdot{x})}\cdot{(1+2\cdot{x})}

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2 years ago
The expression cos(A-B) - cos(A+B) is equal to
olchik [2.2K]
Cos (A-B) - cos (A+B) 
= (cosAcosB +sinAsinB) - (cosAcosB - sinAsinB)
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Ans: 4
6 0
3 years ago
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Dexter has 83 tiles left over from tiling his bathroom floor and he would like to use them to tile the front entrance of his hou
creativ13 [48]

Answer: [0, 396]

Step-by-step explanation:

The domain is the acceptable values of x in the function.  In this case, x = t, the number of tiles.  If you think about it, the minimum number of tiles is 0 (you can't have a negative number of tiles), and the maximum number of tiles is 44 (you only have 44 tiles).  So, the domain for this function is from 0 to 44.

0 to 44 written in interval notation is [0,44].

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A(t) = 9t

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With the maximum number of tiles, 44, the area you get is 396 cm².  Therefore, the acceptable values of A are from 0 to 396.

0 to 396 written in interval notation is [0, 396].

4 0
3 years ago
30% of 60 is <br><br> 30%of ____ is 60
ololo11 [35]
You know that 3 times 2 is 6 so 30'times 20 equals 60
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