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zepelin [54]
3 years ago
15

Suppose the bank installs nine alarms. What is the expected number of alarms that will detect a burglar?

Mathematics
1 answer:
Harrizon [31]3 years ago
3 0
The answer is 6 because
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Step-by-step explanation:

2,27, 52, 77, 105, 130, 155, 180, 205 230, 255, 280, 305

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2 years ago
What is the value of z for the parallelogram shown? <br><br> A.130 <br> B.40<br> C.10<br> D.26
galben [10]
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September 6 is a Read Book Day.Polina read 5 times as many pages as Marcus read.Together,the read 108 pages.How many pages did e
Gemiola [76]

Answer:

The number of pages that Polina read was 90 and the number of pages that Marcus read was 18

Step-by-step explanation:

Let

x -----> number of pages that Polina read

y ----> number of pages that Marcus read

we know that

x+y=108 ----> equation A

x=5y -----> equation B

substitute equation B in equation A and solve for y

5y+y=108\\6y=108\\y=18

Find the value of x

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therefore

The number of pages that Polina read was 90 and the number of pages that Marcus read was 18

3 0
3 years ago
Inage of triangle after 90 degree rotation
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I would say a cause they have the same curves
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Kipish [7]
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