Chia Vye Rern's answer to :-)'s Secondary 4 E Maths Singapore question.
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a)
- Solve each inequality respectively:
x > -21/4, x < 20/3
- then combine the answers:
-21/4 < x < 20/3
b)
- subtract everything by 2: -10 <= 5x <= 35
- divide everything by 5: -2 <= x <= 7
c)
- split into 2 separate inequalities
- solve them: x > 12/7, x <= 21/4
- then combine the answers: 12/7 < x <= 21/4
- Solve each inequality respectively:
x > -21/4, x < 20/3
- then combine the answers:
-21/4 < x < 20/3
b)
- subtract everything by 2: -10 <= 5x <= 35
- divide everything by 5: -2 <= x <= 7
c)
- split into 2 separate inequalities
- solve them: x > 12/7, x <= 21/4
- then combine the answers: 12/7 < x <= 21/4
Date Posted:
2 years ago
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