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zysi [14]
3 years ago
6

☺️☺️can anyone do a step by step explanation. You dont have too but if possible. Thanks

Mathematics
2 answers:
Mandarinka [93]3 years ago
7 0
QR and QS are perpendicular bisectors of the isosceles triangle XYX
so QR= QS
1/2 x + 2 = x - 10
1/2 x - x = - 10 - 2
-1/2x = - 12
      x = (-12) * (-2/1)
      x = 24

QS = 24 - 10
QS = 14

Answer
C . 14
goldenfox [79]3 years ago
5 0
Since the triangle above is isosceles, its legs are congruent. If RS was drawn, we can see visually how QR and QS are congruent also. QR and QS have the same slope, so they would travel the same distance before intersecting. Therefore, we can set up an equation where the value of QR equals the value of QS.

QR = QS
1/2x + 2 = x - 10
multiply both sides to eliminate the denominator
x + 4 = 2x - 20
24 = x
subtract x from both sides to get all "x" terms on one side
add 20 to both sides to get all non-variable terms on one side.
QS = 24 - 10
Substitute the value of x back into the value of QS
QS = 14
Combine all like terms.

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