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jek_recluse [69]
3 years ago
14

Use the disruptive property to write an expression equivalent 5×(3+4)

Mathematics
1 answer:
Ulleksa [173]3 years ago
4 0
5x(3+4)= 5x3+5x4
15+20
35
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Identify the surface with the given vector equation. r(u, v) = 2 sin(u) i + 5 cos(u) j + v k, 0 ≤ v ≤ 5 plane hyperbolic parabol
olchik [2.2K]
Note that this just produces three parametric equations:

x(u) = 2 \sin(u)
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In the x-y plane, this is just he parametric equation for an ellipse (as a function of u). The z is simply a linear function. 

The surface is then an ellipse extruded along the z-axis. We get a elliptic cylinder.
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its 1200 i think i work it out but i could have done it wrong


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2 years ago
If sin(x) = 5/13, and x is in quadrant 1, then tan(x/2) equals what?
Rufina [12.5K]
x is in quadrant I, so 0, which means 0, so \dfrac x2 belongs to the same quadrant.

Now,

\tan^2\dfrac x2=\dfrac{\sin^2\frac x2}{\cos^2\frac x2}=\dfrac{\frac{1-\cos x}2}{\frac{1+\cos x}2}=\dfrac{1-\cos x}{1+\cos x}

Since \sin x=\dfrac5{13}, it follows that

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\tan x is also positive for x in quadrant I, so you take the positive root again. You're left with

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3 years ago
Sarah bought a TV for $250. Three years later she sold it for $180. Work out her percentage loss.
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70/250 x 100
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2 years ago
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I hope that helped
7 0
3 years ago
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