Question

Сделайте пж фаст дам 50 баллов
Спам=бан

Answer 1

1.

$1) \: \frac{b}{9} \times \frac{4}{5k} = \frac{4b}{45k}$

$2) \: \frac{m}{3b} \times \frac{15}{m} = \frac{5}{b}$

$3) \: \frac{4}{m} \div \frac{5}{a} = \frac{4}{m} \times \frac{a}{5} = \frac{4a}{5m}$

.

2.

$1) \: 12c \times \frac{x}{3c {}^{2} } = \frac{4x}{c}$

$2) \: ( - \frac{5x}{7y {}^{3} }) {}^{2} = \frac{25x {}^{2} }{49y {}^{6} }$

$3) \: \frac{m {}^{2} - 2my + y {}^{2} }{x {}^{2} - 4x } \div \frac{m - y}{x - 4} = \frac{(m - y) {}^{2} }{x(x - 4)} \times \frac{x - 4}{m - y}$

$= \frac{m - y}{x}$