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ivolga24 [154]
3 years ago
6

Solve for x: 10 - 2x = -5x - 5 (1) X = -5 (3) X= 4 (2) x 15 (4)x= -15

Mathematics
2 answers:
Alekssandra [29.7K]3 years ago
7 0
10 - 2x = -5x -5
+2x +2x
10 = -3x -5
+5 +5
15= -3x
X= -5
topjm [15]3 years ago
3 0
First you add 5x on both sides:

10−2x+5x=−5

=
10+3x=−5

Then you subtract 10 from both sides:

3x=−5−10
=
3x=-15

Then you divide both sides by 3

X= -15/3

X= -5
​​
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What is the perimeter of the trapezoid with vertices Q(8, 8), R(14, 16), S(20, 16), and T(22, 8)? Round to the nearest hundredth
EleoNora [17]
Check the picture below.

so... you can pretty much see how long RS and QT are, you can just count the units off the grid.

now, let's find QR's length

\bf ~~~~~~~~~~~~\textit{distance between 2 points}\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
%  (a,b)
&Q&(~ 8 &,& 8~) 
%  (c,d)
&R&(~ 14 &,& 16~)
\end{array}~~ 
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\\\\\\
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\\\\\\
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and let's also find the length for ST

\bf ~~~~~~~~~~~~\textit{distance between 2 points}\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
%  (a,b)
&S&(~ 20 &,& 16~) 
%  (c,d)
&T&(~ 22 &,& 8~)
\end{array}~ 
d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2}
\\\\\\
ST=\sqrt{(22-20)^2+(8-16)^2}\implies ST=\sqrt{2^2+(-8)^2}
\\\\\\
ST=\sqrt{4+64}\implies ST=\sqrt{68}\implies ST=\sqrt{4\cdot 17}
\\\\\\
ST=\sqrt{2^2\cdot 17}\implies ST=2\sqrt{17}

so, add the lengths of all sides, and that's the perimeter of the trapezoid.

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3 years ago
Read 2 more answers
What would this be?:)
Mnenie [13.5K]

Answer:

\d

Step-by-step explanation:

:)

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<h2>Answer:</h2>

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