Question

помогите пожалуйста!!!

Answer 1

<v> =
$\frac{s1 + s2}{t1 + t2} = \frac{v1t1 + v2t2}{t1 + t2} = \frac{2.2 \times 35 + 2.8 \times 31.5}{2.2 + 2.8} = \frac{77 + 88.2}{5} = \frac{165.2}{5} = \frac{1652}{10} \div 5 = \frac{1652}{10} \times \frac{1}{5} = \frac{1652}{50} = \frac{3304}{100} = 33.04$