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3 years ago

X - y = 8 and -x + y = 4 solve the equation of linear equations by substitution

Mathematics

1 answer:

ch4aika [34]3 years ago

7 0

Answer:

No solution

Step-by-step explanation:

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What is the solution to the system of equations? O (-8,-4) O(-4,-8) O (44) 0 (4-4)

Novay_Z [31]

Answer:

Step-by-step explanation:

I'm pretty sure the answer is C sorry if I'm wrong

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2 years ago

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Determine the value of z for the system of equations.

Natali5045456 [20]

Answer:

{x, y, z} = {-4, 2, 4}

i think this is the answer

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2 years ago

Find the solution of the differential equation dy/dt = ky, k a constant, that satisfies the given conditions. y(0) = 50, y(5) =

irga5000 [103]

Answer: The required solution is $y=50e^{0.1386t}.$

Step-by-step explanation:

We are given to solve the following differential equation :

$\dfrac{dy}{dt}=ky~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

where k is a constant and the equation satisfies the conditions y(0) = 50, y(5) = 100.

From equation (i), we have

$\dfrac{dy}{y}=kdt.$

Integrating both sides, we get

$\int\dfrac{dy}{y}=\int kdt\\\\\Rightarrow \log y=kt+c~~~~~~[\textup{c is a constant of integration}]\\\\\Rightarrow y=e^{kt+c}\\\\\Rightarrow y=ae^{kt}~~~~[\textup{where }a=e^c\textup{ is another constant}]$

Also, the conditions are

$y(0)=50\\\\\Rightarrow ae^0=50\\\\\Rightarrow a=50$

and

$y(5)=100\\\\\Rightarrow 50e^{5k}=100\\\\\Rightarrow e^{5k}=2\\\\\Rightarrow 5k=\log_e2\\\\\Rightarrow 5k=0.6931\\\\\Rightarrow k=0.1386.$

Thus, the required solution is $y=50e^{0.1386t}.$

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3 years ago

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Find X : 10/x +2/x = 12.x =

stich3 [128]

Answer: I believe it’s 1,-1. not 100% but pretty positive it is! hope this helps!

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2 years ago

Solve for this problem for N

mezya [45]

Answer:

N = 3

Step-by-step explanation:

I don't know what the whole thing above is, but just disregard that.

All it is here is cross multiplication.

So 28N = 21 * 4

Multiply...

28N = 84

And divide each side by 28

N = 3

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2 years ago

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X - y = 8 and -x + y = 4 solve the equation of linear equations by substitution​

X - y = 8 and -x + y = 4 solve the equation of linear equations by substitution