Tyrant4life
04.10.2019 •
Mathematics
3x – y = 4 2x + y = 6 (2, 2) (3, 0) (–1, –7) (0, –4)
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Ответ:
3x – y = 4(1)
2x + y = 6(2)
by (1) : y=3x-4
by(2) : y = -2x+6
3x-4 = -2x+6
5x =10 x =2
y = 3(2)-4 =2
(2, 2) has solution of system
Ответ:
21,908 is 22,000 to the nearest thousand. the digits after the 1 of 21 is 9. So we round up