Answer:
1) It is the trickiest door to open
Step-by-step explanation:
5.01 FLVS
Do substitution
2(7-2y) = 5
14 - 4y = 5
-4y = -9, y = 9/4
2x + 9/4 = 5
8x + 9 = 20
8x = 11, x = 11/8
Final answer: x = 11/8, y = 9/4
Using Pythagorean theorem, the answer should be D
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