Here is a clue =)
A = 30+0.02x
B = 25+0.04x
now solve for A<B =)
And A=B to get the "breaking point".
Phone Company #1 charges $30 for a monthly plan and $0.02 for each additional minute. Phone Company #2 charges $25 and $0.04 for each additional minute.
A) Set up an inequality that can be used to determine for what amount of time (in minutes) Phone Company #2 is the better plan.
Any help will be much appreciated. Thanks.