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3 years ago

Help, i'll give you brainliest

Mathematics

2 answers:

KiRa [710]3 years ago

8 0

21
Hope this helps:)
Lmk if it’s correct

Vitek1552 [10]3 years ago

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i cant see the imagine it says download pdf and it doesnt show anything

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What’s the correct answer

s344n2d4d5 [400]

Substituting m for 9

h(9) = 9^2 - 3*9

h(9) = 81 -27

h(9) = 54

Third option!

4 0

3 years ago

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Solve the following recurrence relation: <br> <img src="https://tex.z-dn.net/?f=A_%7Bn%7D%3Da_%7Bn-1%7D%2Bn%3B%20a_%7B1%7D%20%3D

-Dominant- [34]

By iteratively substituting, we have

$a_n = a_{n-1} + n$

$a_{n-1} = a_{n-2} + (n - 1) \implies a_n = a_{n-2} + n + (n - 1)$

$a_{n-2} = a_{n-3} + (n - 2) \implies a_n = a_{n-3} + n + (n - 1) + (n - 2)$

and the pattern continues down to the first term $a_1=0$ ,

$a_n = a_{n - (n - 1)} + n + (n - 1) + (n - 2) + \cdots + (n - (n - 2))$

$\implies a_n = a_1 + \displaystyle \sum_{k=0}^{n-2} (n - k)$

$\implies a_n = \displaystyle n \sum_{k=0}^{n-2} 1 - \sum_{k=0}^{n-2} k$

Recall the formulas

$\displaystyle \sum_{n=1}^N 1 = N$

$\displaystyle \sum_{n=1}^N n = \frac{N(N+1)}2$

It follows that

$a_n = n (n - 2) - \dfrac{(n-2)(n-1)}2$

$\implies a_n = \dfrac12 n^2 + \dfrac12 n - 1$

$\implies \boxed{a_n = \dfrac{(n+2)(n-1)}2}$

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2 years ago

Select the two expressions equal to the area of this figure in square centimeters.

zepelin [54]

Answer:

1.(6*4) + (18*6) + (6*4)

1.(6*10) + (6*6) + (6*10)

Step-by-step explanation:

there are two ways to break this shape into three rectangles:

1.Top right rectangle, Top left rectangle, Bottom long rectangle

2. Left rectangle, Middle square, Right rectangle.

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2 years ago

There are (2^4)^2 ⋅ 2^0 books in a cupboard. What is the total number of books in the cupboard?

mixas84 [53]

There are 256 books in the cupboard

4 0

3 years ago

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Can someone please help me with this one question?!?

Vsevolod [243]

Answer:

x = 3 , − 8

Step-by-step explanation:

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3 years ago

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