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sailormaries7101
26.02.2020 •
Mathematics
Solve the systems of equations in numbers 1 – 9 using substitution. Show your work.
1. y = (2/3)x - 1
y = -x + 4
2. x + y = 0
3x + y = -4
3. 4x + 3y = -15
y = x + 2
4. x + 2y = -4
4y = 3x + 12
5. y = 2x
x + y = 3
6. x = 3 - 3y
x + 3y = -6
7. y = -2x + 1
y = x - 5
8. y = (1/2)x - 3
y = (3/2)x – 1
9. x + y = 2
4y = -4x + 8
Solve numbers 10 – 18 using the elimination method. Show your work.
10. y = (2/3)x - 1
y = -x + 4
11. x + y = 0
3x + y = -4
12. 4x + 3y = -15
y = x + 2
13. x + 2y = -4
4y = 3x + 12
14. y = 2x
x + y = 3
15. x = 3 - 3y
x + 3y = -6
16. y = -2x + 1
y = x - 5
17. y = (1/2)x - 3
y = (3/2)x – 1
18. x + y = 2
4y = -4x + 8
19. Why are the substitution and elimination methods necessary when we already know how to solve systems of linear equations using the graphing method?
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Ответ:
idk 10
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