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inn
6 days ago
11

Find the missing term in the following sequence ? 1, 4, 11, 26, 57, 120, ______

Mathematics
2 answers:
Inessa [3.8K]6 days ago
7 0

Given sequence;

1, 4, 11, 26, 57, 120, _

The missing term  =?

Solution;

To identify the connection between each term, we can determine the missing value;

      1, 4, 11, 26, 57, 120, _;

 let’s start with the first two;

       3 x 2 + 1  = 7 + 4  = 11

       7 x 2 + 1  =  15 + 11 = 26

       15 x 2 + 1 = 31 + 26 = 57

       31 x 2 + 1 = 63 + 57 = 120

       63 x 2 + 1 = 127  + 120 = 247

   

        From this pattern, we conclude that the missing term is 247

babunello [3.6K]6 days ago
5 0

Answer:

247

Step-by-step explanation:

1, 4, 11, 26, 57, 120. The emerging pattern of the series is as follows:

4–1 = 3; 3–1 = 2 = 2^1

11–4 = 7; 7 - 3 = 4 = 2^2

26 - 11 = 15; 15 - 7 = 8 = 2^3

57 - 26 = 31; 31 - 15 = 16 = 2^4

120 - 57 = 63; 63 - 31 = 32 = 2^5

Thus, the next number should be 64+63 = 127+120 = 247.

Verification: 247–120 = 127; 127–63 = 64 = 2^6, which checks out.

So, the following number is indeed 247. 2^n+(n-1)

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Now we calculate ∠SOR as follows: ∠SOR = ∠ROT - ∠SOT

∠SOR = 160° - 100°

∠SOR = 60°

It is stated that the angles ROQ, QOS, and POT all have the same measure.

Thus, ∠SOQ + ∠QOR = 60°

Since ∠SOQ equals ∠QOR, we can express this as:

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From which we find ∠SOQ = 60° ÷ 2

∠SOQ = 30°

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3 0
6 days ago
A food truck operator has traditionally sold 75 bowls of noodle soup each day. He moves to a new location and after a week sees
lawyer [3979]

Answer:

The p-value for this test is 0.031. It should be interpreted as "There is a 96.9% likelihood that the actual average of soup sales at the new site exceeds 75 bowls it daily"

Step-by-step explanation:

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7 0
13 days ago
A follow-up study will be conducted with a sample of 20 people from the 300 people who responded yes (support) and no (do not su
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Response:

Detailed explanation:

Hello!

Stratified sampling involves the categorization of the population into subgroups based on pre-established criteria for the study. These subgroups consist of homogeneous units concerning the relevant characteristics. In this instance, individuals in the groups will represent only one of the two potential opinions (support or not support) and not both.

The researcher determines the sample size desired, considering several factors such as finances, material availability, and accessibility to experimental subjects (for instance, if they are endangered species, larger sample sizes may not be feasible).

One might conduct proportionate stratified sampling by selecting a proportion of respondents who answered "yes" along with those who answered "no."

In this sampling method, taking a specific proportion from each subgroup allows for a more straightforward extrapolation of results to the overall populations. For example, if you needed a sample size of n = 20, each stratum would ideally contain half, meaning 10 from the “yes” group and 10 from the “no” group.

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4 0
9 days ago
Harry put blue and green marbles in a bag. Exactly 3/4 of the marbles in the bag are blue. Which of the following could be the t
tester [3895]

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D

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3 0
4 days ago
Read 2 more answers
Josh needs to cover a rectangular opening of 12 inches × 18 inches with plywood. how much will he need, in square feet, if he wa
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We understand that

1 foot corresponds to 12 inches.


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Dimensions of the plywood needed are

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Step 2

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Step 3

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The final result is

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5 0
8 days ago
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