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Varvara68 [4.7K]
3 years ago
14

PLZ HELP ITS DUR RIGHT NOW AND PLZ ANSWER TRUTHFULLY

Mathematics
1 answer:
yuradex [85]3 years ago
5 0

Answer:

x=141

Step-by-step explanation:

(n-2)•180 = Sum of all the interior angles

n = # of sides

(7-2)•180

5•180

900= Sum of all the interior angles

Add all the angles and equal them to 900

125+122+131+x+7+x+107+x-15=900

Add all the numbers up first on the left side

477+3x=900

3x=423

x=141

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Read 2 more answers
Create an Equation that represents a line that is perpendicular to a line with a slope -2?
Mademuasel [1]

(first step:

you must remember the following theorem :

Two lines whose slopes are m1 and m2, are perpendicular if and only if m1m2 = -1

(second step

you have one slope given and it  is -2 then you  substitute in the previous equation

(third step

m1*-2=-1⇒m1=-1/-2⇒m1= 1/2

it means that new slope of the equation is 1/2

(for step

with a given point and a  the slope you can build the equation that is perpendicular to a line with slope -2

the equation point- slope is

y-y1=m(x-x1)

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[y-(-5)]=  1/2(x-2)⇒ (y+5) = 1/2x-1/4⇒y-1/2x+5+1/4⇒y-1/2x+21/4 =0

(five step

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6 0
3 years ago
I need to solve for X btw they are same side interior ( supplementary angles )​
Sidana [21]

Answer:

x = 17.2

Step-by-step explanation:

since they are supplementary, when you add then together they equal 180

4x + 8 + 6x = 180

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subtract 8 from both sides

10x = 172

divide each side by 10

x = 17.2

hope this helps :)

7 0
3 years ago
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