Question

помогите пожалуйста!!!

Answer 1

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