3 years ago

Jenny is four years older than Miki. Five years ago Jenny was twice as old as Miki. How old are they now? Show your thinking.

Mathematics

1 answer:

sergij07 [2.7K]3 years ago

3 0

Answer:

Step-by-step explanation:

Jenny is 2*J+4

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The question gives the relationship to be

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3 years ago

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The family of functions y = ce^{-2x} + e^{-x} is solution of the equation y' + 2y = e^{-x}. Find the constant c which defines th

Rufina [12.5K]

Answer:

$c = 1190.2$

Step-by-step explanation:

We have the following solution:

$y(x) = ce^{-2x} + e^{-x}$

We want to find the value of x that satisfies the following condition:

y(3) = 3.

This means that when x = 3, y = 3. So

$y(x) = ce^{-2x} + e^{-x}$

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3 years ago