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PolarNik [594]
3 years ago
11

What is the scale factor of the dilation of triangle DEF?

Mathematics
2 answers:
cluponka [151]3 years ago
8 0

Answer:

I don't know what triangle def side lengths are

Zielflug [23.3K]3 years ago
7 0

Answer:

I believe its A: 3/10

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a_1=-7 \\ a_2=-2 \\  \\ d=a_2-a_1=-2-(-7)=5 \\  \\  \\ S_{25}= \cfrac{2(-7)+(25-1)5}{2}\cdot25 = \cfrac{-14+120}{2}\cdot25 =\cfrac{106}{2}\cdot25 =1325

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