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Zarrin [17]
4 years ago
10

Ujalakhan01! Please help me! ASAP ONLY UJALAKHAN01. What's (x-1)(x-1)?

Mathematics
2 answers:
bogdanovich [222]4 years ago
5 0

Answer:

Step-by-step explanation:

simply :

  • (x-1)(x-1)= (x-1)²

                     = x²-2x=1

                     

patriot [66]4 years ago
4 0

Answer:

x^2-2x+1

Step-by-step explanation:

=> (x-1)(x-1)

Using FOIL

=> x^2-x-x+1

=> x^2-2x+1

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You have to find the vertex of of the parabole: the y-coordinate is the highest point.

Remember that the x-coordinate of the vertex of a parabole is at - b / 2a.

That is  x = - 0.851 / [ 2(-0.000475) = 895.79

The corresponden y is y = </span><span>-0.000475(895.79)^2 + 0.851(895.79) = 381.16 feet above the river.

How long is section of bridge above the arch?

The section of the brige is equal to the difference of the two roots

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=> x( - 0.000475x + 0.851) = 0

=> x = 0 and x = 0.851 / 0.000475 = 1791.58

Then the section is 1791.58 feet long.

Therefore, the answer is the option </span><span>D)The bridge is about 381.16 ft. above the river, and the length of the bridge above the arch is about 1,791.58 ft </span>
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