Answer:
No it's not!
Step-by-step explanation:
because the length (long) of J and K are totally different whereas the breadth(width) of J and K is also different which does make similar in sense
Assume the parabola is placed on a graph where the x-axis is the top of the dish.
The vertex is then at (0,-30) The x-intercepts or zeros are at (-30,0) and (30,0)
The equation of such parabola would be:
![y = a(x+30)(x-30)](https://tex.z-dn.net/?f=y%20%3D%20a%28x%2B30%29%28x-30%29)
Plug in vertex to find value of 'a'
![-30 = a(0+30)(0-30) \\ \\ a = \frac{-30}{(-30)(30)} = \frac{1}{30}](https://tex.z-dn.net/?f=-30%20%3D%20a%280%2B30%29%280-30%29%20%5C%5C%20%20%5C%5C%20a%20%3D%20%5Cfrac%7B-30%7D%7B%28-30%29%2830%29%7D%20%3D%20%5Cfrac%7B1%7D%7B30%7D)
Now find the focus given that
![p = \frac{1}{4a}](https://tex.z-dn.net/?f=p%20%3D%20%5Cfrac%7B1%7D%7B4a%7D)
![p = \frac{1}{4(1/30)} = \frac{30}{4} = 7.5](https://tex.z-dn.net/?f=p%20%3D%20%5Cfrac%7B1%7D%7B4%281%2F30%29%7D%20%3D%20%5Cfrac%7B30%7D%7B4%7D%20%3D%207.5)
Answer: the microphone should be placed 7.5 inches from vertex.
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Answer:
(x, y, z) = (1, 2, 3)
Step-by-step explanation:
The equations that result from reduction to row-echelon form are ...
x = 0.4 +0.2t
y = 5.6 -1.2t
z = t
Then t must have a value 5n+3 for 0 ≤ n < 1. That is, t=3.
x = 0.4 +0.2(3) = 1
y = 5.6 -1.2(3) = 2
z = 3
The integers that satisfy are (x, y, z) = (1, 2, 3).
this is the answer
i have checked this answer thrice