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3 years ago

Geometry help urgent

Mathematics

2 answers:

Maslowich3 years ago

5 0

Answer:

(-1,1) is your answer

hope this helps

Natali5045456 [20]3 years ago

5 0

Answer:

(-3,-5)

Step-by-step explanation:

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Find the area of the composite figure.

-Dominant- [34]

Answer:

I guess the correct answer is 116 cm

Step-by-step explanation:

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3 years ago

What is the height of the previous problem?

ioda

Um I actually don’t know the answer I just need coins have a good day maam or sir there is the answer

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3 years ago

At city community college, every freshman must take English 101. The English department wants to know whether students who take

vesna_86 [32]

Answer: randomization

Step-by-step explanation: apex

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3 years ago

Does the average person live for at least 1,000,000 minutes?

irakobra [83]

Convert to hours, then days, then years
60 minutes per hour
1000000/60=50000/3=16666.7 hours

24 hours per day
16666.7/24=694.4 days
365 days per year
694.4/365=1.9

the average person lives at least 1.9 years
maybe, I guess

6 0

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

2 years ago