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enyata [817]
3 years ago
10

What is this? I need it please 1/3x+2=1/5x-8

Mathematics
2 answers:
tatiyna3 years ago
6 0

Answer:

x=-75

Step-by-step explanation:

e-lub [12.9K]3 years ago
4 0

Answer:

\boxed {x = -75}

Step-by-step explanation:

Solve for the value of x:

\frac{1}{3}x + 2 = \frac{1}{5}x - 8

-Take \frac{1}{5}x and subtract it from \frac{1}{3}x:

\frac{1}{3}x + 2 - \frac{1}{5}x = \frac{1}{5}x - \frac{1}{5}x - 8

\frac{2}{15}x + 2 = -8

-Subtract 2 to both sides:

\frac{2}{15}x + 2 - 2 = -8 - 2

\frac{2}{15}x = -10

-Multiply both sides by \frac{15}{2}, which is the reciprocal of \frac{2}{15}.

x = -10 \times (\frac{15}{2})

x = \frac{-10 \times 15}{2}

x = \frac{-150}{2}

-Divide -150 by 2:

x = \frac{-150}{2}

\boxed {x = -75}

So, the value of x is -75.

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trasher [3.6K]

Answer:

z=5\left(\cos \left(\dfrac{3\pi}{2}\right)+i\sin \left(\dfrac{3\pi}{2}\right)\right)

Step-by-step explanation:

If a complex number is z=a+ib, then the trigonometric form of complex number is

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where, r=\sqrt{a^2+b^2} and \tan \theta=\dfrac{b}{a}, \theta is called the argument of z, 0\leq \theta\leq 2\pi.

The given complex number is -5i.

It can be rewritten as

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\tan \theta=\dfrac{-5}{0}

\tan \theta=\infty

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\theta=\dfrac{3\pi}{2}

So, the trigonometric form is

z=5\left(\cos \left(\dfrac{3\pi}{2}\right)+i\sin \left(\dfrac{3\pi}{2}\right)\right)

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