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3 years ago

How is this ejercice: 15+x=4

Mathematics

1 answer:

alexandr402 [8]3 years ago

4 0

X equals negative 11

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Which of the following values of x is a solution to the equation negative 2 x plus 8 equals 14?

andreev551 [17]

Answer:

x= -3

Step-by-step explanation:

-2 x 3 =6 so 6+8=14

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3 years ago

The point R is halfway between the integers on the number line below and represents the number ____. (Use the hyphen for negativ

PSYCHO15rus [73]

I guess ur just gunna have to bear with whatever until we have a multiple choice answer selection.

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3 years ago

The manager wants to advertise that anybody who isn't served within a certain number of minutes gets a free hamburger. But she d

aksik [14]

Answer:

The number of minutes advertisement should use is found.

x ≅ 12 mins

Step-by-step explanation:

(MISSING PART OF THE QUESTION: AVERAGE WAITING TIME = 2.5 MINUTES)

For such problems, we can use probability density function, in which probability is found out by taking integral of a function across an interval.

Probability Density Function is given by:

$f(t)=\left \{ {{0 ,\-t$

Consider the second function:

$f(t)=\frac{e^{-t/\mu}}{\mu}\\$

Where Average waiting time = μ = 2.5

The function f(t) becomes

$f(t)=0.4e^{-0.4t}$

The manager wants to give free hamburgers to only 1% of her costumers, which means that probability of a costumer getting a free hamburger is 0.01

The probability that a costumer has to wait for more than x minutes is:

$\int\limits^\infty_x {f(t)} \, dt= \int\limits^\infty_x {}0.4e^{-0.4t}dt$

which is equal to 0.01

Solve the equation for x

$\int\limits^{\infty}_x {0.4e^{-0.4t}} \, dt =0.01\\\\\frac{0.4e^{-0.4t}}{-0.4}=0.01\\\\-e^{-0.4t} |^\infty_x =0.01\\\\e^{-0.4x}=0.01$

Take natural log on both sides

$ln (e^{-0.4x})=ln(0.01)\\-0.4x=ln(0.01)\\-0.4x=-4.61\\x= 11.53$

<h3>Results</h3>

The costumer has to wait x = 11.53 mins ≅ 12 mins to get a free hamburger

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3 years ago

kaylie has 164 stamps in her collection.her friend nellie has 229 more stamps than kaylie.how many stamps do kaylie and nellie h

STALIN [3.7K]

657 stamps is what they would have combined

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3 years ago

The new price of the plane ticket

katen-ka-za [31]

Answer:

159.25

Step-by-step explanation:

175 multiplied by 6% is 10.5

If you subtract 10.5 from 175 you will get 164.5

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3 years ago

Read 2 more answers