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MariettaO [177]

3 years ago

10

Just give answers I don't care the explaining just give me the answers I don't want to explain because I'm Savage just give answ

ers to the blank ones

1 answer:

Aneli [31]3 years ago

6 0

3). 9 10/11
5). 11 6/15
7). 11 5/6
9). 9 7/8
11). 17 1/2
13). 22 7/12

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45 and 46 pls thx and I need work too

ira [324]

45 is b
and there is no picture of 46

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3 years ago

if ihave 1000 apples and my mom takes away 475 then my dad takes 597 then my dog eats 4 then my brother takes 2747 how many do I

liberstina [14]

Answer: The answer is

6177

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3 years ago

Read 2 more answers

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

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

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

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

4 0

3 years ago

Whats the answer to (7x+3)-(2x+1)

nignag [31]

<span>(7x+3)-(2x+1)
=</span><span>7x + 3 - 2x - 1
= 5x + 2</span>

6 0

3 years ago

Kerry wants to give each student in her class 1/2

qwelly [4]

Answer:

60

Step-by-step explanation:

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3 years ago