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katrin2010 [14]
3 years ago
12

The sum of five times a number, and 1, is equal to four times the number

Mathematics
1 answer:
larisa86 [58]3 years ago
7 0

Answer:

5x + 1 = 4x

You can really put any letter for "a number":

5n + 1 = 4n

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Let X = the time between two successive arrivals at the drive-up window of a local bank. If X has an exponential distribution wi
LuckyWell [14K]

Answer:

a) E(X)=1

b) σ=1

c) P(X>1)=0.368

d) P(2<X<5)=0.128

Step-by-step explanation:

We have X: "the time between two successive arrivals at the drive-up window of a local bank", exponentially distributed with λ = 1.

a) We have to compute the expected time between two successive arrivals.

The expected value for X as it is exponentially distributed is:

E(X)=\dfrac{1}{\lambda}=\dfrac{1}{1}=1

b) We have to compute the standard deviation of X.

The standard deviation is calculated as:

\sigma=\dfrac{1}{\lambda}=\dfrac{1}{1}=1

c) The probability that X is larger than 1 (P(X>1))

We can express the probability as:

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d) The probability that X is between 2 and 5 (P(2<X<5))

P(X>t)=e^{-\lambda t}\\\\\\P(25)\\\\P(2

4 0
2 years ago
2y+5y-3yTo the second power
gogolik [260]

Answer:16y I think

Step-by-step explanation:

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3 years ago
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An arc of length 3 feet is cut off by a central angle of π/4 radians. Find the area of the sector formed
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12s + 5 = 77
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s = 72/12
s = 6 ...//

Ans = C ... 12x + 5 = 77 ...
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3 years ago
WILL GIVE BRAINLIEST<br>What is the value of a in the problem 4a-3=D<br>explain answer
mixas84 [53]
In this case, you aren't going to get an integer for the value of a, but you can rearrange the equation to equal a.

4a-3=D       add 3 to both sides
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4 0
3 years ago
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