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klasskru [66]
4 years ago
5

∆ABC is mapped to ∆A'B'C' using each of the given rules. Select each of the rules which would result in the two triangles being

congruent.
(x,y)→(x+3,y−4)



(x,y)→(3x,3y)



(x,y)→(0.4x,0.4y)



(x,y)→(−x,−y)
Mathematics
1 answer:
zvonat [6]4 years ago
4 0
The first one is two translations. The last one is two reflections. Those two don't change the size of the sides or angles, so the triangles before and after are congruent. The second and third rules change the lengths of the sides, so those don't qualify.
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She can wear outfits differently in 167 days.

Given that Lucy wants to wear different clothes everyday, and she has 8 dresses, 7 pairs of shoes, and 3 pairs of earrings, and Lucy can choose 1 dress, 1 pair of shoes, and 1 pair of earrings every day, but however 1 dress and 1 pair of shoes don't look good together, to determine, in such circumstances, how many days can she wear outfits differently, the following calculation must be made:

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