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DedPeter [7]
3 years ago
13

Triangle STU has reflected over line m to form Triangle S'T'U'. What is the value of y?

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
3 0

Answer:

  D.  5

Step-by-step explanation:

The congruence of S'T' with ST tells you ...

  9 = x +7

  2 = x

The congruence of S'U' and SU tells you ...

  4x = y +3

  4·2 -3 = y = 5 . . . . substitute the value of x; subtract 3

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