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Sergeeva-Olga [200]
3 years ago
7

Solve for x. 3(3x - 1) + 23 - x) = 0

Mathematics
1 answer:
enot [183]3 years ago
3 0
9x-3+69-3x=0
6x+66=0
6x=-66
X=-11
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Find a parametric representation for the part of the cylinder y2 + z2 = 49 that lies between the planes x = 0 and x = 1. x = u y
sweet-ann [11.9K]

Answer:

The equation for z for the parametric representation is  z = 7 \sin (v) and the interval for u is 0\le u\le 1.

Step-by-step explanation:

You have the full question but due lack of spacing it looks incomplete, thus the full question with spacing is:

Find a parametric representation for the part of the cylinder y^2+z^2 = 49, that lies between the places x = 0 and x = 1.

x=u\\ y= 7 \cos(v)\\z=? \\ 0\le v\le 2\pi \\ ?\le u\le ?

Thus the goal of the exercise is to complete the parameterization and find the equation for z and complete the interval for u

Interval for u

Since x goes from 0 to 1, and if x = u, we can write the interval as

0\le u\le 1

Equation for z.

Replacing the given equation for the parameterization y = 7 \cos(v) on the given equation for the cylinder give us

(7 \cos(v))^2 +z^2 = 49 \\ 49 \cos^2 (v)+z^2 = 49

Solving for z, by moving 49 \cos^2 (v) to the other side

z^2 = 49-49 \cos^2 (v)

Factoring

z^2 = 49(1- \cos^2 (v))

So then we can apply Pythagorean Theorem:

\sin^2(v)+\cos^2(v) =1

And solving for sine from the theorem.

\sin^2(v) = 1-\cos^2(v)

Thus replacing on the exercise we get

z^2 = 49\sin^2 (v)

So we can take the square root of both sides and we get

z = 7 \sin (v)

4 0
3 years ago
Help! im awful at these problems!!<br> solve the formula: t=v+k/g for g.
Sedbober [7]

Answer:

g = \frac{k}{t-v}

Step-by-step explanation:

Given

t = v + \frac{k}{g}

Multiply through by g to clear the fraction

tg = vg + k ( subtract vg from both sides )

tg - vg = k ← factor out g from each term on the left side

g(t - v) = k ← divide both sides by (t - v)

g = \frac{k}{t-v}

4 0
3 years ago
Y = – 2x + 2
kirill115 [55]

Answer:

its 4

Step-by-step explanation:

solve for y and then find the point of intersection

3 0
3 years ago
Please help meeee !!!!!!!!! Will mark Brianliest correct answer !!!!!!!!!!!!!!!!!!
Andru [333]

Answer:

it is 7 inches tall - pythagorean theorem

Step-by-step explanation:

6 0
3 years ago
Pamela age is two times Jiri age. the sum of their ages is 87 what is Jiri age
sveticcg [70]
Pamela is 43 years old
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