Question

When we multiply -5$\le x<-3$ by -3; inequation becomes:

• A. 15$\ge -3x>9$
• B. 9$<-3x<15$
• C. 15$\le -3x<9$
• D. 15$<-3x\le 9$

Answer 1

Answer: (A), (B)

The correct options are
A 15$\ge -3x>9$
B 9$<-3x<15$

On multiplying with negative entity , sign of inequation changes.

Therefore $(-5\le x<-3)\times (-3)$
= 15$\ge -3x>9$ = 9$<-3x<15$