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Rom4ik [11]
2 years ago
6

20,10,5, ... Find the 9th term.

Mathematics
1 answer:
iren [92.7K]2 years ago
6 0

Answer:

0.078125.

Step-by-step explanation:

This is a geometric sequence with first term a1 = 20 and common ratio r = 10/20 = 5/10 = 0.5.

nth term = a1 r^(n -1) so here:

9th term = 20(0.5)^(9-1)

= 20(0.5)^8

= 0.078125.

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A band sells tickets to a concert cost either $15 for adults or $10 for students. A total of 150 tickets are sold. If the band m
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Answer:

Number of adult tickets sold= 100

Step-by-step explanation:

Giving the following information:

Adults tickets= $15

Student tickets= $10

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Total sales= $2,000

<u>First, we determine the systems of equations:</u>

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x + y = 150

x= number of adults tickets sold

y= number of students tickets sold

<u>Now, we isolate x in one equation, and substitute it in the other one:</u>

x= 150 - y

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15*100 + 10*50= 2,000

100 + 50 = 150

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Step-by-step explanation:

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Step-by-step explanation:

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