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den301095 [7]
2 years ago
15

Represents a coefficient from the expression given? 9x – 20 + x2

Mathematics
1 answer:
yanalaym [24]2 years ago
8 0

Answer:

(x -  \frac{ - 9 +  \sqrt{161} }{2} )(x -  \frac{ - 9 -  \sqrt{161} }{2} )

Step-by-step explanation:

1. \: a(x -  \frac{ - b +  \sqrt{ {b}^{2}  - 4ac} }{2a} ) \: (x -  \frac{ - b -  \sqrt{ {b}^{2}  - 4ac} }{2a})  \\ 2. \: (x -  \frac{ - 9 + \sqrt{ {9}^{2} - 4 \times  - 20 }  }{2} ) \: (x -  \frac{ - 9 -  \sqrt{ {9}^{2} - 4 \times  - 20 } }{2} )

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5 and 6. square of 5 is 25 and square of 6 is 36. must be between 5 and 6
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Blackcap birds (Sylvia atricapilla) migrate out of Germany before wintertime. Prior to the 1960s, all members of a particular bl
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Answer:

D- The blackcaps will begin nesting at their wintering sites in Spain or the United Kingdom, resulting in a larger blackcap population migrating back to Germany after the breeding season has ended.

Step-by-step explanation:

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3 years ago
Mr.Hall stands 200 meters from the base of the water tower. He finds the angle of elevation to the top of the water to be 27 deg
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Height of the tower = 101.9 m

Solution:

Given data:

Angle θ = 27°

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The given image shows it is a right triangle.

Using basic trigonometric ratio formulas,

$\tan \theta=\frac{\text { Opposite side of } \theta}{\text { Adjacent side of } \theta}

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$0.5095 =\frac{{ h}}{200}

Do cross multiplication, we get

0.5095 × 200 = h

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3 years ago
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