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aleksandr82 [10.1K]
3 years ago
14

Half of the sum of x and 2

Mathematics
2 answers:
natka813 [3]3 years ago
7 0

Answer:

1/2+2x or 1/2+2+x

Step-by-step explanation:

i don't know but this what i think i hope this helps

MArishka [77]3 years ago
7 0

Answer:

see explanation

Step-by-step explanation:

The sum of x and 2 is x + 2 and half this sum is

\frac{1}{2} (x + 2)  or

\frac{x+2}{2}

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A rumor spreads through a small town. Let y(t) be the fraction of the population that has heard the rumor at time t and assume t
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Answer:

The answer is shown below

Step-by-step explanation:

Let y(t) be the fraction of the population that has heard the rumor at time t and assume that the rate at which the rumor spreads is proportional to the product of the fraction y of the population that has heard the rumor and the fraction 1−y that has not yet heard the rumor.

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b)

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y=\frac{\frac{1}{9} e^{kt}}{1+\frac{1}{9} e^{kt}}\\y=\frac{1}{1+9e^{-kt}}

At t = 2, y = 40% = 0.4

c) At y = 75% = 0.75

y=\frac{1}{1+9e^{-0.8959t}}\\0.75=\frac{1}{1+9e^{-0.8959t}}\\t=3.68\ days

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It took me awhile but I got it

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