Question

1) 3: 1/c-2
2) 2/7 : 2/5
3) 4/a+2 : 16/b

Answer 1

Объяснение:

1)

$3 \div \frac{1}{c - 2} = 3(c - 2) = 3c - 6$

2)

$\frac{2}{7} \div \frac{2}{5} = \frac{2 \times 5}{7 \times 2} = \frac{5}{7}$

3)

$\frac{4}{a + 2} \div \frac{16}{b} = \frac{4b}{(a + 2) \times 16} = \frac{b}{4(a + 2)} = \frac{b}{4a + 8}$