Question

Решите пожалуйстааааааа

Answer 1

1.
1.3:$frac{1}{5}$ = 1.3 : 0.2 = 13 : 2 = 6.5
16:0.8 = 160:8 = 20
6.5 < 20 ⇒ 1.3:$frac{1}{5}$ < 16:0.8

2.
$frac{7}{x} - frac{x}{5} = frac{35}{5x} - frac{x^{2} }{5x} = frac{35- x^{2} }{5x}$

3.
$frac{5 sqrt{27} }{ sqrt{12} } = frac{15 sqrt{3} }{2 sqrt{3} } = frac{15}{2} = 7,5$