I can’t see the top of the image. Can you make it more upper a little? I think it is 9
You would be subtracting by 5 so the next three would be -16, -21, -26
Answer: The the speed of elevators is 22.55.
Explanation:
It is given that observation deck of the willis tower in Chicago Illinois is 1353 feet above the ground elevators lift visitors to that level in 60 seconds.
The speed is the change in distance with respect to time.
![\text{Average Speed}=\frac{\text{Total Distance}}{\text{Total Time}}](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20Speed%7D%3D%5Cfrac%7B%5Ctext%7BTotal%20Distance%7D%7D%7B%5Ctext%7BTotal%20Time%7D%7D)
From the given information the total distance is 1353 and the total time is 60 seconds. So by the above formula we get,
![\text{Average Speed}=\frac{1353}{60}](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20Speed%7D%3D%5Cfrac%7B1353%7D%7B60%7D)
![\text{Average Speed}=22.55](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20Speed%7D%3D22.55)
Therefore, the speed of elevators is 22.55.
Answer:
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Step-by-step explanation:
Number of solutions: no roots
Type of solution: Not Real
Step-by-step explanation:
We need to identify the number of solutions and their types using the discriminant.
We are given: ![40x=10x^2+41\\](https://tex.z-dn.net/?f=40x%3D10x%5E2%2B41%5C%5C)
Rearranging:
![40x-10x^2-41=0\\10x^2-40x+41=0](https://tex.z-dn.net/?f=40x-10x%5E2-41%3D0%5C%5C10x%5E2-40x%2B41%3D0)
Discriminant can be found by: ![b^2-4ac](https://tex.z-dn.net/?f=b%5E2-4ac)
where b=-40, a=10 and c=41
Putting values:
![b^2-4ac\\=(-40)^2-4(10)(41)\\=1600-1640\\=-40\\](https://tex.z-dn.net/?f=b%5E2-4ac%5C%5C%3D%28-40%29%5E2-4%2810%29%2841%29%5C%5C%3D1600-1640%5C%5C%3D-40%5C%5C)
So, Discriminant is -40
If the discriminant is less than zero i.e -40 then there are no real roots.
So, Number of solutions: no roots
Type of solution: Not Real
Keywords: discriminant
Learn more about discriminant at:
#learnwithBrainly