1. 4/10 × 15/20 simplifies to 3/10. 2. b/15 × 21/b simplifies to 7/5. 3. (a-1)²/30 × 6/(a-1) simplifies to (a-1)/5. 4. 3b-5/b² • b⁴/5-3b simplifies to -b². 5. d/12 • 40/d simplifies to 10/3.
2. 14/15
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Answers & Comments
1. 4/10 × 15/20 simplifies to 3/10. 2. b/15 × 21/b simplifies to 7/5. 3. (a-1)²/30 × 6/(a-1) simplifies to (a-1)/5. 4. 3b-5/b² • b⁴/5-3b simplifies to -b². 5. d/12 • 40/d simplifies to 10/3.
2. 14/15