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arlik [135]
3 years ago
12

I've tried to get the answer for this 13 times now (not joking), plzzz help: write a formula that represents the number of peopl

e in the nth row (pre-calc problem, I only need the formula)
I will report if sent a link

Mathematics
1 answer:
gtnhenbr [62]3 years ago
6 0

Answer:

  • 2820 seats
  • aₙ = 3n + 9

Step-by-step explanation:

<u>This is an AP with:</u>

  • The first term a₁ = 12
  • Common difference d = 3
  • Number of terms n = 40

<u>Number of the seats:</u>

  • Sₙ = 1/2*n(a₁ + aₙ) = 1/2n(2a₁ + (n - 1)d)
  • S₄₀ = 1/2*40(12*2 + 39*3) = 2820 seats

<u>Formula of nth term:</u>

  • aₙ = a₁ + (n - 1)d
  • aₙ = 12 + (n - 1)*3 = 12 + 3n - 3 = 3n + 9
  • aₙ = 3n + 9

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Using it's concept, the domain of the function shown in the graph is:

B. -6 \leq x \leq 6.

<h3>What is the domain of a function?</h3>

The domain of a function is the set that contains all possible input values for the function. In a graph, the domain is the set that contains all values of x.

From this graph, the function is defined for values of x between -6 and 6, hence the domain is given by:

B. -6 \leq x \leq 6.

More can be learned about the domain of a function at brainly.com/question/10891721

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2 years ago
Fiona has a box with 5 red buttons and 9 blue buttons.She randomly selected one button, took it out of the box, then selected an
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Answer:

B. 10/91

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We add 5 and 9 to get the total buttons.

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5/14 = .35

Now, that we've taken out 1 button.

The amount of buttons available changes.

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2 years ago
8,128 in expanded form no spaces
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Step-by-step explanation:

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How to make expanded form:

<em>Its easy! all that must be done is that you break down the number like if you had a number 5091 this is how you break it down 5000 + 90 + 1. Breaking numbers down makes it easier to solve and you will be amazingg at math in no time!</em>

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yuradex [85]
Hey there,
solving for a is just like you think of all other letter as a constant
i.e the only variable is a
so you need to subtract b as a start
      d=a+b-c/3
-b             -b
=============

    -b+d=a-c/3                now it's time to add c/3 (isolate a by itself in one side)

     -b+d=a-c/3
+c/3         +c/3
==============
c/3-b+d=a

Hence you have solved for a




4 0
3 years ago
Which relation represents a function?
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C is the rigth answer because all the other three has two x values in common. :)
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