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Lubov Fominskaja [6]
2 years ago
5

What are the solutions of the quadratic equation? X2 = 7x + 4

Mathematics
2 answers:
masya89 [10]2 years ago
5 0

x=7/2+-1/2 \sqrt 65\\



Step-by-step explanation:


Ilya [14]2 years ago
4 0

Which are the solutions of the quadratic equation?  

Given: x2 = 7x + 4

x2 = 7x + 4

0 = -x2 + 7x + 4

Answer:  x = (7 + √33) / 2

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Attached solution with work.

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Tatiana [17]

Answer:

See attached image for the drawing of the first four trees (circled in green)

The patterns is:

x = 2+3n  and  y= 3+2n

Position of 7th tree is: (20,15) (circled in orange in the image)

Step-by-step explanation:

Starting at the location (2,3) the next x and y positions are given by:

x = 2+3n since the horizontal position needs to be increased by 3 units on each iteration,

and y= 3+2n since the vertical position needs to be increased by 2 units on each iteration

being n= 1 through 6 (to account for the next 6 trees that need to be planted)

With such pattern, the location of the seventh tree would be:

x = 2 + 3*6 =2 + 18 = 20

y = 3 + 2*6 = 3 + 12 = 15

That is, the point (20,15) on the plane.

Also see attached image.

8 0
3 years ago
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ohaa [14]

Answer:

\approx \: 21.2 \:  {ft}^{2}

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central \:  \angle   =  \frac{\pi ^{c} }{6}  = 30 \degree \\  \\ area \: of \: the \: sector =  \frac{30 \degree}{360 \degree}  \times \pi {(9)}^{2}  \\  \\  =  \frac{1}{12}  \times 3.14 \times  81 \\  \\  =   \frac{1}{12}  \times 254.34 \\  \\  = 21.195 \:  {ft}^{2}  \\  \\  \approx \: 21.2 \:  {ft}^{2}

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<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>3 3

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