Question

2) - 2 2/5 * x * 3/7 * y якщо x = - 7 ; y = 1 1/4

Answer 1

$- 2 \frac{2}{5} x \times \frac{3}{7} y = - \frac{12 \times 3}{5 \times 7} xy = - \frac{36}{35} xy = - \frac{36}{35} \times ( - 7) \times 1 \frac{1}{4} = \frac{36 \times 7 \times 5}{35 \times 4} = 9$