Demi and Juan start saving money for their vacation. Demi starts with $50 and saves $20 each week; Juan started with only $35, but saves $25 each week.

a. Write expressions for Demi and Juan that represents the amount they saved in w weeks.

b. If their vacation is in 4 weeks, who will have more money?

Extension: Write the expression that represents their combined total. Write an expression that represents the difference the amount Juan and Demi have.
​