Ответ:
1.
2.
3.
Ответ:3.
4.{6х-16у=40,
{2х+4у=4;
{3×2х-16у=40,
{2х=4-4у;
{3(4-4у)-16у=40,
{12-12у-16у=40,
{12-28у=40,
{-28у=40-12,
{у=-1,
{2х=4+4,
{х=4.
Ответ: (4;-1).
5. у=kx+b
A(1;7)
B(-1;3)
{7=1k+b,
{3=-1k+b;
{10=2b,
{7=k+b;
{b=5,
{k=7-b;
{k=2.
y=2x+5
Ответ: у=2х+5
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Ответ:
1.
2.
3.
Ответ:3.
4.{6х-16у=40,
{2х+4у=4;
{3×2х-16у=40,
{2х=4-4у;
{3(4-4у)-16у=40,
{2х=4-4у;
{12-12у-16у=40,
{2х=4-4у;
{12-28у=40,
{2х=4-4у;
{-28у=40-12,
{2х=4-4у;
{у=-1,
{2х=4+4,
{у=-1,
{х=4.
Ответ: (4;-1).
5. у=kx+b
A(1;7)
B(-1;3)
{7=1k+b,
{3=-1k+b;
{10=2b,
{7=k+b;
{b=5,
{k=7-b;
{b=5,
{k=2.
y=2x+5
Ответ: у=2х+5