Dave and Jessie are both working two jobs over the summer to earn some extra money. For his two jobs, Dave walks dogs and babysits. He earns $7 per hour walking dogs and $10 per hour babysitting. Dave has a weekly goal of earning more than $150 while working no more than 18 hours.
A. Write a system of linear inequalities that can be used to determine all the possible numbers of hours Dave can work each job and meet his weekly goals.
Show or explain whether the ordered pair (8,8) is a possible solution to this situation.