Question

Сор по математике помогите

Answer 1

Ответ:

3)

AB=4.4

BC=7.6

AC=4.4+7.6=12

4)

$\\ 7\frac{3}{5} - 4 \frac{2}{3} = \frac{44}{15} = 2 \frac{14}{15}$

5)

$x - \frac{2}{7} = \frac{1}{2} + \frac{1}{3 } \\ x - \frac{2}{7} = \frac{5}{6} \\ x = \frac{5}{6} + \frac{2}{7} \\ x = \frac{47}{42}$