Em saves at least 20% of what she earns each week. if she earns $140 each week for 4 weeks, which inequality describes the total amount she saves?

The inequality that represents how much she would save is 

$112 < x

Here is how to come up with this answer.

1.  Use math to determine the minimum amount she will save (at least).

  0.2 x 140 x 4 = $112

2.  x would represent all the possible amounts Em could save, so anything greater than or equal to $112 is possible.  

You could also write this as x > $112.

It is blindness and randomization