Question

Помогите пожалуйста срочно даю 27 баллов!

Answer 1

$frac{ 6 frac{4}{5} }{1 frac{2}{15} } = frac{ frac{34}{5} }{ frac{17}{15} } = frac{34}{5} times frac{15}{17} = frac{2}{1} times frac{3}{1} = frac{6}{1} = 6$
$frac{ - 1 frac{1}{3} }{2 frac{1}{6} } = frac{ - frac{4}{3} }{frac{13}{6} } = - frac{4}{3} times frac{6}{13} = - frac{4}{1} times frac{2}{13} = - frac{8}{13}$
а)
$frac{x}{ - 2.3} = frac{ - 5.8}{ - 4.6}$
-4,6х=13,34
x=-2,9

б)
$frac{ - 2.8}{35} = frac{ - 4.2}{x}$
-2,8х=-147
х=52,5

в)
$frac{ - 2 frac{2}{9} }{x} = frac{11 frac{2}{3} }{ - 1 frac{2}{5} }$
$frac{ - frac{20}{9} }{x} = frac{ frac{35}{3} }{ - frac{7}{5} }$
$frac{35}{3} times x = - frac{20}{9} times ( - frac{7}{2} )$
$frac{35}{3} times x = frac{10 times7 }{9 times 1}$
$x = frac{ frac{70}{9} }{ frac{35}{3} } = frac{70}{9} times frac{3}{35} = frac{2}{3} times frac{1}{1} = frac{2}{3}$

г)
$frac{ - frac{2}{7} }{ frac{3}{14} } = frac{x}{ frac{5}{6} }$
$frac{3}{14} times x = - frac{2}{7} times frac{5}{6}$
$frac{3}{14} times x = - frac{1}{7} times frac{5}{3}$
$frac{3}{14} times x = - frac{5}{21}$
$x = frac{ - frac{5}{21} }{ frac{3}{14} } = - frac{5}{21} times frac{14}{3} = - frac{5}{3} times frac{2}{3} = - frac{10}{9} = - 1 frac{1}{9}$

Answer 2

Списала из g d z

Answer 3

???

Answer 4

Нет

Answer 5

Сама решила