happykiddo
  • happykiddo
In the figure below, line j is parallel to line k. If y-x=10, what is the value of x?
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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happykiddo
  • happykiddo
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happykiddo
  • happykiddo
the left bottom corner of the triangle says x+20
anonymous
  • anonymous
|dw:1432931744356:dw|

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happykiddo
  • happykiddo
nope thats what I did, and the answer is wrong. The options are: a.) 50 b.) 60 c.) 70 d.) 80 e.) 150 P.S. sorry it took so long for me to respond my computer froze.
happykiddo
  • happykiddo
Gotta love those convoluted Geometry SAT questions...
DanJS
  • DanJS
The sum of 3 angles of a triangle is 180 If the lines are parallel, alternate interior angles are equal. The unmarked angle in the triangle is X , so that gives you 180 = (X+20) + y + X
DanJS
  • DanJS
and they say y-x=10 so you have 2 equations, and 2 unknowns , solve for X and Y
DanJS
  • DanJS
Solving, i get X=50, Y=60
DanJS
  • DanJS
180 = (X+20) + Y + X and Y - X = 10
happykiddo
  • happykiddo
thanks DanJS

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