Question

Срочно!!!!!!!!!!!!!!!!
даю 100 баллов​

Answer 1

Ответ:

$3)\ \ 1.\ y=2x-5\ ;\ \ C\\\\2.\ y=x+5\ ;\ \ A\\\\3.\ y=2x+5\ ;\ \ B\\\\4.\ y=x-5\ ;\ \ D$

$4)\ \ \left\{\begin{array}{l}x+y=5\\3x-y=3\end{array}\right\ \ \ \ Otvet:\ \ (\, 2\, ;\, 3\, )\ .$

$5)\ \ a)\ \ y=14-2x\ \ ,\ \ \ x\in D(y)=(-\infty ;+\infty )\\\\y=\dfrac{x}{x+2}\ \ ,\ \ x+2\ne 0\ \ ,\ \ x\in D(y)=(-\infty ;-2\, )\cup (-2\, ;+\infty \, )\\\\\\b)\ \ y=\dfrac{2x+5}{3}\ \ ,\ \ -1\leq x\leq 5\\\\y(-1)=\dfrac{-2+5}{3}=1\ \ ,\ \ y(5)=\dfrac{10+5}{3}=5\\\\y\in E(y)=[\ 1\ ;\ 5\ ]$