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Scorpion4ik [409]
3 years ago
6

 A tree casts a shadow that is about 10 ft long. Javier, who is about 5 ft tall, is standing near the tree. Javier’s shadow is a

bout 4 ft long. What is the estimated height, t, of the tree?
A)8 ftB)12.5 ftC)15.5 ftD)18.5 ft
Mathematics
1 answer:
spin [16.1K]3 years ago
4 0
The tree is 11ft  
explanation: javier is 5ft 5-1 =4
11-1=10 <span />
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FrozenT [24]

Answer:

1 .4x2-9= 2x+3,2x-3

2 .16x2-1=4x-1,4x+1

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Step-by-step explanation:

16x² − 1  = (4x − 1)(4x + 1) ;  16x² − 4  = 4(2x + 1)(2x − 1); 4x² − 1  = (2x + 1)(2x − 1) ;

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The square root of 16x² is 4x and the square root of 1 is 1; this gives us (4x-1)(4x+1).

16x² − 4 is also the difference of squares.  The difference of 16x² is 4x and the square root of 4 is 2; this gives us (4x-2)(4x+2).  However, we can also factor a 2 out of each of these binomials; this gives us

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4x² − 1  is also the difference of squares.  The square root of 4x² is 2x and the square root of 1 is 1; this gives us (2x-1)(2x+1).

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Answer:

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