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Alex
3 years ago
13

1.The sum of three numbers is twenty. The second number is four times the first and the sum of the first and third is eight. Wha

t are the three numbers?
Mathematics
2 answers:
Mnenie [13.5K]3 years ago
7 0

Answer:

3,12,5

Step-by-step explanation:

sum of three numbers = 20

sum of first and third = 8

second number = sum of three - sum of first and third = 20-8=12

second number = 4* first

first = 12/4 = 3

third = 8-3 = 5

lesya692 [45]3 years ago
5 0

Answer:

Step-by-step explanation:

4x=12

x=12/4

x=3 answer

y=4*3=12 answer.

z=8-3=5 answer.

proof

3+12+5=20

20=20

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The exponential probability distribution, with mean m, is described by the following equation:

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The probability of finding a value higher than x is:

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The manager of a fast-food restaurant determines that the average time that her customers wait for service is 3.5 minutes.

This means that m = 3.5, \mu = \frac{1}{3.5} = 0.2857

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The values of x for which:

P(X > x) = 0.01

So

e^{-\mu x} = 0.01

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Rounding to the nearest number, the advertisement should use 16 minutes.

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