Evaluate the following expressions: 1. \(\frac{4.3}{7.5}\) 2. \(\frac{9.3}{3.2}\) 3. \(17a - 11 = 13 - 3a\) 4. \(\frac{3}{5} \cdot \frac{15}{12}\)

Решение:

1. \(\frac{4.3}{7.5}\)
2. \(\frac{9.3}{3.2}\)
3. \(17a - 11 = 13 - 3a\)
   \(17a + 3a = 13 + 11\)
   \(20a = 24\)
   \(a = \frac{24}{20} = \frac{6}{5} = 1.2\)
4. \(\frac{3}{5} \cdot \frac{15}{12} = \frac{3 \cdot 15}{5 \cdot 12} = \frac{45}{60} = \frac{3}{4} = 0.75\)

Ответ: 1. \(\frac{4.3}{7.5}\), 2. \(\frac{9.3}{3.2}\), 3. \(a = 1.2\), 4. \(0.75\)