Why I don't see anything wrong with this inequality?

Question

Describe and correct the error in solving the inequality.

 

-4m≥16

 

m≥-4

Answer 1

-4m>16

-4m/-4>16/-4

   m<-4 (when you multiply or divide an inequality by a negative number you reverse the sign)

Answer 2

Isabelle, let's look at the possibilities.

 

If m can be greater than 4, let it be 5. -5 x 4 = -20, which is less than 16.

 

When we divide by a negative number, in this case -1, we reverse the sign. Since -4 x 4 = -16, we keep the "or equal to."

 

Hope this helps!