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quester [9]
3 years ago
9

15 POINTS pre algebra I think

Mathematics
1 answer:
Sergio [31]3 years ago
3 0

Answer:

28.6 (90% sure)

Step-by-step explanation:

To solve this work backwards

D_{3}=42

D_{2}=42*.80 = 33.6

D_{1}=33.6-5 = 28.6

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