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Nezavi [6.7K]
3 years ago
13

1) Find the 128th term for the sequence 9, 4, -1, -6, 11,...

Mathematics
1 answer:
Nikitich [7]3 years ago
5 0
To determine an nth term of an arithmetic sequence, we use the expression an = a1 + (n-1)d where a1 is the first term in the sequence, n is the number of the term in the sequence and d is the common difference. For a geometric sequence, it is expressed an = a1r^(n-1). We calculate as follows:

1. a128 = 9 + (128-1)(-5)
     a128 = -626

2. a97 = (-3)(-2)^(97-1)
    a97 = -2.377x10^29
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Which is the smallest number? 3/4,1/5,10/23,2/31
bixtya [17]
A quick and easy way to do this particular question is to think all of these numbers are close to 1/2 except 2/31. So, the lowest is 2/31.

H O P E T H I S H E L P S!
4 0
3 years ago
Read 2 more answers
Question 1
Alexxandr [17]

Answer:

No, it is NOT a function.

Step-by-step explanation:

A functions' inputs are assigned to exactly one output.

We are given the points:

{(8,2) (4,-3) (6,4) (8,1)}

The input of 8 is repeating.

The given relation is not a function.  

Hope this helps!

5 0
3 years ago
Using the traditional formula, a 95% CI for p1 − p2 is to be constructed based on equal sample sizes from the two populations. F
inn [45]

Answer:

49

Step-by-step explanation:

Given:

Width = 0.4

Let's take the z value of 95% which is = 1.96

Let's assume population proportion p1 and p2 = 0.5

For margin of error E, the relation between the width and margin of error is 2E.

i.e 2E = 0.4

E = 0.2

To find the sample size, n, let's use the formula :

n= \frac{z^2*(p_1(1-p_1) + p_2(1-p_2))}{E^2}

= \frac{1.96^2(0.5(1-0.5)+0.5(1-0.5))}{0.2^2}

= 48.02

≈ 49

8 0
3 years ago
Eric created a rectangular patio using 1 foot square paving stones,which are sold in batches by the dozen. The patio measures 7
Nuetrik [128]
I believe it is 56 because 7•8 is 56 and 1•56 is 56
6 0
3 years ago
Of 201 adults selected randomly from one town, 179 have credit cards. Find a 90% confidence interval for the true proportion of
tino4ka555 [31]

Answer:

I think this is a probability problem.

Step-by-step explanation:

201*0.9 the divide by 179??

7 0
3 years ago
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