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tankabanditka [31]
3 years ago
12

X+2x=180 i need help on this

Mathematics
2 answers:
Lapatulllka [165]3 years ago
7 0

Solution, x+2x=180\quad :\quad x=60

Steps:

x+2x=180

\mathrm{Add\:similar\:elements:}\:x+2x=3x,\\3x=180

\mathrm{Divide\:both\:sides\:by\:}3,\\\frac{3x}{3}=\frac{180}{3}

\mathrm{Simplify},\\x=60

\mathrm{The\:Correct\:Answer\:is\:x=60}

\mathrm{Hope\:This\:Helps!!!}

\mathrm{-Austint1414}

viktelen [127]3 years ago
4 0

x+2x = 180

add like terms

3x=180

divide both sides by 3

x=60

Answer: x=60


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Answer:


Step-by-step explanation:

Firstly, note that -2i really is just z = 0 + (-2)i, so we see that Re(z) = 0 and Im(z) = -2.

When we're going from Cartesian to polar coordinates, we need to be aware of a few things! With Cartesian coordinates, we are dealing explicitly with x = blah and y = blah. With polar coordinates, we are looking at the same plane but with angle and magnitude in consideration.

Graphing z = -2i on the Argand diagram will look like a segment of the y axis. So we ask ourselves "What angle does this make with the positive x axis? One answer you could ask yourself is -90°! But at the same time, it's 270°! Why do you think this is the case?

What about the magnitude? How far is "-2i" stretched from the typical "i". And the answer is -2! Well... really it gets stretched by a factor of 2 but in the negative direction!

Putting all of this together gives us:

z = |mag|*(cos(angle) + isin(angle))

= 2*cos(270°) + isin(270°)).

To verify, let's consider what cos(270°) and sin(270°) are.

If you graph cos(x) and look at 270°, you get 0.

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3 years ago
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krok68 [10]
Wa=0.5Wb, Ha=20, Hb is unkown
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A cell site is a site where electronic communications equipment is placed in a cellular network for the use of mobile phones. Th
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Answer:

(a) 74553

(b) 172120

(c) 234802

Step-by-step explanation:

Given

y = \frac{340110}{1 + 377e^{-0.259t}}

Solving (a): 1998

Year 1998 means that:

t =1998 -  1980

t =18

So, we have:

y = \frac{340110}{1 + 377e^{-0.259*18}}

y = \frac{340110}{1 + 377e^{-4.662}}

y = \frac{340110}{1 + 3.562}

y = \frac{340110}{4.562}

y = 74553 --- approximated

Solving (b): 2003

Year 2003 means that:

t = 2003 -  1980

t =23

So, we have:

y = \frac{340110}{1 + 377e^{-0.259*23}}

y = \frac{340110}{1 + 377e^{-5.957}}

y = \frac{340110}{1 + 0.976}

y = \frac{340110}{1.976}

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Solving (c): 2006

Year 2006 means that:

t = 2006 -  1980

t =26

So, we have:

y = \frac{340110}{1 + 377e^{-0.259*26}}

y = \frac{340110}{1 + 377e^{-6.734}}

y = \frac{340110}{1 + 0.4485}

y = \frac{340110}{1.4485}

y = 234802 --- approximated

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Step-by-step explanation:

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x(x-8) 3(x+8)

(x-8)(x+8)

x-8=0 or x+8=0

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6 0
2 years ago
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