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arsen [322]
3 years ago
11

A(1)=−13 a(n)=a(n−1)+4 ​ find the 2nd term in the sequence

Mathematics
2 answers:
Novay_Z [31]3 years ago
8 0

Answer:

-9

Step-by-step explanation:

Hope this helps!

krek1111 [17]3 years ago
5 0

Answer:

n=2

a(2)= -13(2-1)+4

a(2) = -13(1)+4

= -13+4

= -9

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assume the age of night school students is normally distributed. A simple random sample of 24 night school students had an avera
aleksley [76]
Let
n = number of data
s = standard deviation (sample)
S = standard deviation (population)

The working equations is

\frac{(n-1) s^{2} }{ x^{2}_{right} }  \ \textless \   S^{2} \ \textless \   \frac{(n-1) s^{2} }{ x^{2}_{left} }

To find x^{2}_{right}, : (1 - 0.90)/2 = 0.05

To find x^{2}_{left}, : 1 - 0.05 = 0.95

Degrees of freedom = n-1 = 24 - 1 = 23

This is shown in the figure attached. Since there is no row for df=23, we interpolate. Thus,

 x^{2}_{left} = 13.093 

 x^{2}_{right} = 35.17 


Substitute all values,

\frac{(24-1) 5.6^{2} }{ 35.17} \ \textless \ S^{2} \ \textless \ \frac{(24-1)  5.6^{2} }{ 13.093} }

Thus the answer is,

20.51\  \textless \ S^{2} \ \textless \ 55.09

5 0
3 years ago
Can u plz add these together.
Rainbow [258]

Answer:

1. -3    

2. 7      

3. -2        

4. 3

Step-by-step explanation:

1.      idk

2.     3.2 move 3b over to get 3.2-3b-4.7=-3.3 move 4.7 over to get

3.2b-3b=4.7-3.3 now 3.2b-3b=.2b and 4.7-3.3=1.4  .2b/.2=b   1.4/.2=7 so b=7

3.     4.6y-y+4=y-1.2 now switch the 4 and the y to read 4.6y-2y=-4-1.2

2.6y=-5.2 divide both sides by 2.6 to get y=-2

4.      7.5c-2.5c+8=-7 move 8 to other side to get 7.5c-2.5c=-8-7

5c=-15 divide both sides by 5 getting c=3

5 0
3 years ago
These expressions below represent four numbers. The value of the median of these expressions is 12.
Airida [17]

Answer:

The mean is 15

Explanation:

The x value that would get a median of 12 is three, which when taken the mean of the numbers when x is three, you get 15

6 0
3 years ago
I need help<br> Fill in the boxes for ur answers
bearhunter [10]

1)4

2) 16

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8 0
3 years ago
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Dafna1 [17]
I feel that the answer is A.

6 0
3 years ago
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