Question

Срочно!!!
Даю 25 баллов!

Answer 1

Ответ 9.

Решение задания прилагаю

Answer 2

Ответ:

9

Пошаговое объяснение:

$\frac{0,4+8(5-0,8*\frac{5}{8})-5:2\frac{1}{2}}{(1\frac{7}{8}*8-(8,9-2,6:\frac{2}{3}))*34\frac{2}{5}} * 90= \frac{0,4+8(5-\frac{4}{5}*\frac{5}{8})-5:\frac{5}{2}}{(\frac{15}{8}*8-(\frac{89}{10}-\frac{13}{5}*\frac{3}{2}))*\frac{172}{5}}*90=\frac{0,4+8(5-\frac{1}{2})-5*\frac{2}{5}}{(15-(\frac{89}{10}-\frac{39}{10}))*\frac{172}{5}} * 90 =$$\frac{0,4+8*\frac{9}{2}-2}{(15-5)*\frac{172}{5}} * 90 = \frac{0,4+4*9-2}{10*\frac{172}{5}} * 90 = \frac{0,4+36-2}{\frac{172}{5}} * 9 = \frac{34,4}{\frac{172}{5}} * 9 = \frac{\frac{172}{5}}{\frac{172}{5}} * 9 = 1*9=9$