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Ne4ueva [31]
3 years ago
7

Evaluate a1 (r)^n-1 for a1 = 2, r= 3, and n = 4. A. 216 B. 18 C. 32 D. 54

Mathematics
1 answer:
DaniilM [7]3 years ago
4 0

Answer:

54

Step-by-step explanation:

a_1  {r}^{n - 1}  \\ 2 \times  {3}^{4 - 1}  \\ 2 \times  {3}^{3}  \\ 2 \times 3 \times 3 \times 3 \\ 2 \times 9 \times 3 \\ 18 \times 3 \\  = 54

Hope this helps you.

Let me know if you have any other questions :-):-)

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6 0
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Tickets at a play cost $10 or $14. If 800 tickets were sold and $9,040 was collected by the box office, how many $14 tickets wer
pav-90 [236]
STEP 1:
determine equations needed

x= # of $10 tickets
y= # of $14 tickets

QUANTITY EQUATION
x + y= 800

COST EQUATION
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STEP 2:
multiply quantity equation by -14

-14(x + y)= -14(800)
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STEP 3:
add new quantity equation in step 2 to cost equation of step 1 to solve for x using elimination

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y term cancels out

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divide both sides by -4

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STEP 4:
substitute x value in step 3 into either original equation

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540 + y= 800
subtract 540 from both sides

y= 260 fourteen dollar tickets


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Hope this helps! :)
5 0
3 years ago
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Step-by-step explanation:

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3 years ago
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