Answer:
Step-by-step explanation:
Given is a differential equation
We have characteristic equation as
The above quadratic cannot be factorised hence use formula
Hence general solution would be
the length of a rectangle is 8 units greater than its width . find the dimensions when its area is 105 square units.
1 answer:
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Answer: The height of fir tree is 9 meters and the height of pine tree is 12 meters.
Step-by-step explanation:
Given : The combined height of one fir tree and one pine tree = 21 meters.
Since, the height of 4 fir trees stacked on top of each other is 24 meters taller than one pine tree.
Let x be the height of fir tree and y be the height of pine tree.
Then we get the following equations:
Adding (1) and (2) we get
Substitute the value of x in (1), we get
Hence, the height of fir tree is 9 meters and the height of pine tree is 12 meters.