!!!!!!!!!!!!!!!!!!!ПОМОГИТЕ ПРОШУ ДАЮ 20 БАЛОВ!!!!!!!!!!!!!!!!!!

№1
$y:(-2)^2=1.8$
$y:4=1.8$
$y=1.8*4$
$y=7.2$

$39:x=-3$
$x=39:(-3)$
$x=-13$

$7.2-(-13)=7.2+13=20.2$

Ответ: на 20.2

№2
$\frac{4 \frac{4}{11}*4 \frac{1}{8}-12 \frac{4}{5} *3 \frac{3}{4} }{11 \frac{2}{3}: \frac{7}{18} } =-1$
1) ${4 \frac{4}{11}*4 \frac{1}{8}= \frac{48}{11}* \frac{33}{8} =18$
2) $12 \frac{4}{5} *3 \frac{3}{4} = \frac{64}{5} * \frac{15}{4} =48$
3) $18-48=-30$
4) ${11 \frac{2}{3}: \frac{7}{18} } = \frac{35}{3} * \frac{18}{7}=30$
5) $-30:30=-1$