Question

Answer 1

a: \(=\dfrac{-15}{7}\cdot\dfrac{35}{12}=\dfrac{-5}{4}\cdot5=-\dfrac{25}{4}\)

b: \(=\dfrac{4}{21}\cdot\dfrac{-28}{9}=\dfrac{-4}{3}\cdot\dfrac{4}{9}=\dfrac{-16}{27}\)

c: \(=\dfrac{-4}{17}\cdot\dfrac{-51}{8}=\dfrac{3}{2}\)

e: \(=\dfrac{-13}{4}\cdot\dfrac{36}{13}=-9\)

k: \(=\dfrac{-9}{8}\cdot\dfrac{4}{51}\cdot\dfrac{-34}{3}=\dfrac{4}{8}\cdot\dfrac{34}{51}\cdot3=\dfrac{1}{2}\cdot\dfrac{2}{3}\cdot3=1\)