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Aliun [14]
3 years ago
13

Solve for x in the equation x^2-4x-9=29

Mathematics
2 answers:
skad [1K]3 years ago
7 0
<span>Solve for x in the equation x^2-4x-9=29
</span>
The Answer Is

X=168
vesna_86 [32]3 years ago
3 0

{x}^{2}  - 4x - 9 = 29 \\  {x}^{2}  - 4x - 38 = 0 \\  \\ x12 =  \frac{ - b  \frac{ + }{ - } \sqrt{d} }{2}  \\ d =  {b}^{2}  - 4ac \\ d = 16 + 152 = 168 \\  \\ x1 =   \frac{4 -  \sqrt{168} }{2}  \\ x2 =  \frac{4 +  \sqrt{168} }{2}
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3 years ago
(1 point) A chain 64 meters long whose mass is 24 kilograms is hanging over the edge of a tall building and does not touch the g
miss Akunina [59]

Answer:

W = 2747,1 [J]

Step-by-step explanation:

Chain is 64 meters long with mass 24 Kg

Then weight of the chain is p = 24 * 9.8

p = 235.2 [N]         N = kg*m/s²

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Total work has two component

- work to lift the 13 top meters of chain  W₁

W₁ = ∫₀ᵇ F(y) dy

- work to lift last ( 64 - 13 ) meters  51   W₂

W₂ = 3.675 * 51 * 13      Kg m² /s²   [J]

W₂ =  2436,53 [J]

We need to calculate  W₁

W₁  = ∫¹³₀ mgy dy    ⇒     W₁  = ∫¹³₀ 3,675 ydy

W₁  = 3,675* ∫¹³₀ ydy     W₁  = 3,675* y²/2  |₀¹³

W₁  = 3,675* 84,5 [J]

W₁  = 310,54 [J]

And total work W

W = W₁ + W₂

W = 310,54  + 2436,53 [J]

W = 2747,1 [J]

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A crate full of oranges weighed 15 lb.
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What's the question ? You're just stating something..
5 0
3 years ago
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