Answer for b- At 10 weeks they will both have $300 in their bank account.
Step-by-step explanation:
<h2>With Graphing Calculator:</h2>
Since Olivia starts with $200 in her savings account and adds $10 per week, we can plug the equation y=200+10x into the calculator (use y= button). For Evelyn's equation, we can plug in 25x+50. Now press 2nd, graph on your calculator and scroll until the two columns on the right are equal. (Picture for help)