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3 years ago

]y =\frac{1}{4} x + 15\\[/tex]

Mathematics

1 answer:

PolarNik [594]3 years ago

6 0

I wish I could help u but like I just need points prey

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Y=2x y=4x+2 i need help solving this it’s the substitution method

PilotLPTM [1.2K]

Answer:

X=-1,y=-2

Step-by-step explanation:

if y =2x

2x=4x+2

so X=-1 and y=-2

4 0

3 years ago

An advertising company designs a campaign to introduce a new product to a metropolitan area of population 3 Million people. Let

Advocard [28]

Answer:

$P(t)=3,000,000-3,000,000e^{0.0138t}$

Step-by-step explanation:

Since P(t) increases at a rate proportional to the number of people still unaware of the product, we have

$P'(t)=K(3,000,000-P(t))$

Since no one was aware of the product at the beginning of the campaign and 50% of the people were aware of the product after 50 days of advertising

P(0) = 0 and P(50) = 1,500,000

We have and ordinary differential equation of first order that we can write

$P'(t)+KP(t)= 3,000,000K$

The integrating factor is

$e^{Kt}$

Multiplying both sides of the equation by the integrating factor

$e^{Kt}P'(t)+e^{Kt}KP(t)= e^{Kt}3,000,000*K$

Hence

$(e^{Kt}P(t))'=3,000,000Ke^{Kt}$

Integrating both sides

$e^{Kt}P(t)=3,000,000K \int e^{Kt}dt +C$

$e^{Kt}P(t)=3,000,000K(\frac{e^{Kt}}{K})+C$

$P(t)=3,000,000+Ce^{-Kt}$

But P(0) = 0, so C = -3,000,000

and P(50) = 1,500,000

$e^{-50K}=\frac{1}{2}\Rightarrow K=-\frac{log(0.5)}{50}=0.0138$

And the equation that models the number of people (in millions) who become aware of the product by time t is

$P(t)=3,000,000-3,000,000e^{0.0138t}$

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4 years ago

14. Which of the following is not a true statement about the scatter plot above?

harina [27]

Answer:

Step-by-step explanation:

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3 years ago

What’s 9+10????????????????? ?

Aleks [24]

Answer:

Step-by-step explanation:

9+10=19

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3 years ago

What is the area of the rectangle

aliya0001 [1]

a^4+2a+8 because if you combine like terms that is what you get

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3 years ago

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