Inequalities

Question

a cell phone plan charges 40 dolars a month plus .10 dolars per text msg. If Lauren wants to keep her monthly bill under 50 dolars how many text msgs x can be sent

Answer 1

Let x = the number of text messages Lauren sends:

 

$40 + ($0.10)x = Cost

 

Lauren wants her Cost to be less than $50:

 

$40 + ($0.10)x < $50

 

Solve for x