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Galina-37 [17]
3 years ago
10

Use appropriate algebra and theorem 7.2.1 to find the given inverse laplace transform. (write your answer as a function of t.) −

1 1 s2 − 720 s7

Mathematics
1 answer:
aleksley [76]3 years ago
4 0
When it comes to laplace equations, there are transformation equations to follow. Generally, when you want to transform a laplace equation, you change the equation from f(t) to F(s). If you do the reverse, it is called the reverse laplace equation.

Based on the given, the useful transformation equation is shown in the attached picture.

When the term is s^2, that must mean that the equation is 1!/s^(1+1) to yield 1/s^2. This means that n=1. Taking the reciprocal s^2 must be equal to 1/t. Thus, for the first term, -11s^2 is equal to -11/t. For the second term, n must be equal to 6 so that 6!/s^(6+1) would yield 720/s^7. Thus, 720s^7 is equal to 1/t^6. 

Hence, the transformed equation is -11/t - 1/t^6

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dybincka [34]

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y = -9x is proportional.

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y=1/2x is proportional

That's it. Only these three equations have (0,0) intercept.

8 0
3 years ago
how many kilograms of pure water is to be added to 100 kilograms of a 30% saline solution to make it a 10% saline solution
Irina-Kira [14]

Answer:

  200 kg

Step-by-step explanation:

If w is the amount of water added, then the concentration of the solution is ...

  salt/solute = 100(0.30)/(100 +w) = 0.10

  30 = 10 +0.10w . . . . . simplify

  20 = 0.10w . . . . . . . . subtract 10

  20/0.10 = w = 200 . . . . divide by 0.10

200 kg of water must be added to dilute the solution to 10%.

4 0
3 years ago
the hardware store where you work charges $.80 including tax, for a pound of nails. a customer purchases 5 3/4 pounds of nails.
ahrayia [7]
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hope this helps
4 0
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7 0
3 years ago
If y=2x^2-5x-3 find the value of y if x= -1​
Gelneren [198K]

Answer:

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Step-by-step explanation:

First we want to raise -1 to the power of 2

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y = 4

8 0
3 years ago
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