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Readme [11.4K]
3 years ago
11

Read the question and answer. Ignore the c please, its incorrect.

Mathematics
1 answer:
Eddi Din [679]3 years ago
5 0

Answer:

The correct choice is E

Step-by-step explanation:

Neither A, B, C, or D are correct, so the right answer must be E. By the way, E isn't shown in the picture.

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PLS HELP
Anika [276]

The chairs in the auditorium illustrates an arithmetic sequence

  • The recursive rule is:  an = an-1 + 8; a1 = 26
  • The explicit rule is:  an = 18 + 8n
  • There are 74 seats in the 7th row
  • 840 chairs can fit the auditorium

<h3>The recursive rule</h3>

From the question, we have the following sequence:

Seats: 18, 26, 34

Rewrite as:

26 = 18 + 8

34 = 26 + 8

The above means that:

The number of seats on a row is 8 added to the the number of seats on the previous row.

Hence, the recursive rule is:

an = an-1 + 8; a1 = 26

<h3>The explicit rule</h3>

In (a), we have:

a1 = 26 and d = 8

The explicit rule is calculated using:

an = a1 + (n -1) * d

This gives

an = 26 + (n - 1) * 8

Expand

an = 26 - 8 + 8n

Evaluate the difference

an = 18 + 8n

Hence, the explicit rule is:

an = 18 + 8n

<h3>The number of seats in the row 7</h3>

This means that n = 7.

So, we  have:

a7 = 18 + 8 * 7 = 74

Hence, there are 74 seats in the 7th row

<h3>The sigma notation</h3>

We have the maximum number of rows to be 12.

So, the sigma notation would be:

\sum\limits^{12}_{n=1} {18 + 8n}

The total number of seats is:

Sn = n/2(2a + (n -1) * d)

This gives

S12 = 12/2(2 * 26 + (12 -1) * 8)

S12 = 840

Hence, 840 chairs can fit the auditorium

Read more about arithmetic sequence at:

brainly.com/question/6561461

7 0
2 years ago
What is p-6a+3-4+9p+14
____ [38]

10p-6a+13

Hope this helps :)

8 0
3 years ago
Which of the ways of getting information listed below is an unblased sampling method
BigorU [14]

Answer:

hmmmm I don't know It really depends on the person who is writing it

Step-by-step explanation:

but if you really want to know most people have different ways of telling people how they got to their answer

4 0
3 years ago
Solve the equation. show all work<br><br> 18^(r-10)=93
Elina [12.6K]
Recall the logarithm rules :

a^y = x  is the same as log_a x = y

In this case, 

a = 18
y = r - 10
x = 93

So,

18^ (r-10) = 93

is the same as

log_18  93 = r - 10

Solve for r to get :

10 + log_18  93 = r
3 0
3 years ago
How can u use number patterns to find the least common multiple of 120 and 360
Natasha2012 [34]
A number pattern would be something that just gets repeated over and over 
so for this example 120+120+120=360

so the least common multiple is 120 because adding 120, three times will get you to 360
4 0
3 years ago
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