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Scorpion4ik [409]
3 years ago
6

Find an explicit formula for the arithmetic sequence -5,13,31,49,

Mathematics
1 answer:
olasank [31]3 years ago
4 0
The common difference dividing each term from the next is 18.

Then a(n) = -5 + (n-1)(18)

Check:  find a(1) using this formula.  Is a(1) = -5?  a(1) = -5 + (1-1)(18) does equal -5.

Find a(2);     a(2) = -5 + (2-1)(18) = -5 + 18 = 13.  Correct.
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A survey asked students whether they have any siblings and pets. the survey data are shown in the relative frequency table.
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The likelihood that he or she has a pet given that a student does not have a sibling is:

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Let A denote the event that a student does not have a sibling.

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Then A∩B denotes the event that the student does not have a sibling but has a pet.

Let P denote the probability of an event.

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P(B|A)=\dfrac{P(A\bigcap B)}{P(A)}

Also from the table we have:

P(A)=0.25

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Hence,

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Hence, the likelihood is:

60%

5 0
3 years ago
Problem: It takes 1200 workers 8 years to build 3 ziggurats. How many years would It take 1600 workers to build 25 ziggurats? ​
katen-ka-za [31]

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4 0
3 years ago
I don’t know what this is
svet-max [94.6K]

From the graph given

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Hence,

f(3)=g(3)

The answer is the second option

3 0
1 year ago
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