Question

пожалуйста помогите☹️​ срочно срочно!!!!!!!!!!

Answer 1

Ответ:

Объяснение:

$3)\frac{y^{2}-12y+36 }{y^{2}-36 }: \frac{10y-60}{y^{2} +6y} =\frac{(y-6)^{2} }{(y-6)(y+6)} :\frac{10*(y-6)}{y*(y+6)}=\frac{(y-6)*y*(y+6)}{(y+6)*10*(y-6)}=\frac{y}{10} = \frac{70}{10} =7.\\4)\frac{x}{y} =\frac{1}{a};\frac{y}{z} =a\\\frac{x}{y} *\frac{y}{z}=\frac{x}{z}=\frac{1}{a}*a=1\\\frac{x}{z}=1\\ \frac{z}{x} =\frac{1}{\frac{x}{z} } =\frac{1}{1} =1.\\\frac{z}{x} =1.$