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3 years ago

Find the value of x. 4 14 3 6

Mathematics

2 answers:

nadezda [96]3 years ago

5 0

Hello from MrBillDoesMath!

Answer:

Discussion:

As vertical angles are equal, Angle 3 = Angle 2, so

Angle 3 = 3x + 2 (A)

Angles 3 and 7 are corresponding angles and hence equal. So

Angle 3 = Angle 7 => use (A) above and Angle 7 = x + 10

3x + 2 = x + 10 => subtract x from both sides

3x -x + 2 = x - x + 10 =>

2x + 2 = 10 => subtract 2 from both sides

2x = 10 -2 = 8

x = 8/2 = 4

which is the first choice

Thank you,

MrB

belka [17]3 years ago

4 0

The answer is A.) 4..

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Alinara [238K]

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I = -425x² + 45500x -650000
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This is quadratic equation (ax² + bx + c = 0)
$x_{1,2} = \frac{-b+/- \sqrt{ b^{2}-4ac } }{2a} = \frac{-1820+/- \sqrt{ 1820^{2}-4*(-17)*(-44000) } }{2*(-17)} = \\ \\ = \frac{-1820+/- \sqrt{3312400-2992000 } }{-34} = \frac{-1820+/- \sqrt{320400} }{-34} =\frac{-1820+/- 566}{-34} \\ \\ 
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3 years ago