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2 years ago

11

Jumps has $55 in her savings account. This is $21 more than David. Write and solve an equation to find the amount David has in h

is savings account.

1 answer:

adelina 88 [10]2 years ago

7 0

$55 - $21=34 and to check answer do 34+21=55

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-5 2/3 + 3 1/4 + -7 1/3

alexgriva [62]

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2 years ago

Jonathan rode 1.05 miles on friday,1.5 on saturday,1.25 on monday,and 1.1 miles on tuesday.on which day did he ride the shortest

wlad13 [49]

1.05,
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2 years ago

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3 years ago

Suppose that the length of a phone call in minutes is an exponential random variable with parameter λ = 1/ 8. If someone arrives

Elis [28]

Answer:

a) P=0.535

b) P=0.204

c) P=0.286

Step-by-step explanation:

The exponential distribution is expressed as

$F(x>t)=e^{-\lambda t}$

In this example, λ=1/8=0.125 min⁻¹.

a) The probability of having to wait more than 5 minutes

$F(x>5)=e^{-0.125*5}=e^{-0.625}=0.535$

b) The probability of having to wait between 10 and 20 minutes

$F(1020)=e^{-0.125*10}-e^{-0.125*20}\\\\F(10$

c) The exponential distribution is memory-less, so it is independent of past events.

If you have waited 5 minutes, the probability of waiting more than 15 minutes in total is the same as the probability of waiting 15-5=10 minutes.

$F(x>15|t^*=5)=F(x>15)/F(x>5)=\frac{e^{-0.125*15}}{e^{-0.125*5}}=e^{-0.125*(15-5)}\\\\ F(x>15|t^*=5)=e^{-0.125*(10)}=F(x>10)=0.286$

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2 years ago

What is the reason for each step in the solution of the equation? -3(4-6x)

Bingel [31]

Answer:

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Step-by-step explanation:

-3(4-6x)=-12+18x

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2 years ago