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baherus [9]
3 years ago
7

Which of the following expressions are equivalent?

Mathematics
1 answer:
Anni [7]3 years ago
5 0
The answer is D ................... D.................. D
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A bridge is sketched in the coordinate plane as a parabola represented by the equation h=40-0.01x2, where h refers to the height
ElenaW [278]

Answer:

The length of the bridge is 126.492 feet.

Step-by-step explanation:

Let h(x) = 40-0.01\cdot x^{2}, where x is the position from the middle of the bridge, measured in feet, and h(x) is the height of the bridge at a location of x feet, measured in feet. In this case, the length of the bridge is represented by the distance between the x-intercepts of the parabola, which we now find by factorization:

40-0.01\cdot x^{2} = 0 (Eq. 1)

x^{2} = \frac{40}{0.01}

x =\pm \sqrt{\frac{40}{0.01} }

x = \pm 63.246\,ft

Given that the parabola is symmetrical with respect to y-axis, then the length is two times the magnitude of the value found above, that is:

l = 2\cdot (63.246\,ft)

l = 126.492\,ft

The length of the bridge is 126.492 feet.

3 0
3 years ago
Find x and y ........
Marrrta [24]

Answer:

A

Step-by-step explanation:

8 0
3 years ago
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If 3x2 – 2x + 7 = 0, then (x – 1/3)^2=
xz_007 [3.2K]
I'm not sure but I think the answer might be, (3x-1)^2/9
7 0
4 years ago
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Please help !! Geometry homework. Will mark brainliest answer !
Ann [662]

Answer:

It is True.

Step-by-step explanation:

Let's solve the rational equation and if it is ture.

x/8 = 5/4

Cross multiplying, we get

4x = 5*8

4x = 40

Dividing both sides by 4, we get

x = 10.

Therefore, x = 10 is true.


Thank you. :)


4 0
3 years ago
Read 2 more answers
I need help someone help me out please
Alekssandra [29.7K]

Answer:

(multiple)

Step-by-step explanation:

it says 2,0 which 2 is the bottom line. You go to 2 at the bottom then go up to 0. Therefore, 2 is C. Start on the bottom, and move your finger up until you hit the second number. Right in the middle of that is your answer. Hope this helps! :)

3 0
3 years ago
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