skatingby7522
12.07.2019 •
Mathematics
Which line contains the point (1, -3)?
1. 4x-y=7 4 x − y = 7
2. 2x+5y=4 2 x + 5 y = 4
3. 7x-y=15 7 x − y = 15
4. x+5y=21
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Ответ:
Step-by-step explanation:
Put the values of x = 1 and y = -3 to the equations of a line and check the equality:
1. 4x - y = 7
4(1) - (-3) = 4 + 3 = 7 CORRECT
2. 2x + 5y = 4
2(1) + 5(-3) = 2 - 15 = -13 ≠ 7
3. 7x - y = 15
7(1) - (-3) = 7 + 3 = 10 ≠ 15
4. x + 5y = 21
1 + 5(-3) = 1 - 15 = -14 ≠ 21
Ответ: