Question 1045716
The amount that mary drives changes from week to week, so the amount that she spends on gas each week also changes. However, she has calculated that, over the last year, she spent a total of $1,450 on gas.
(a.) on average how much does she spend each week on gas?
There are 52 weeks in a year so {{{1450/52=27.88461538}}}  Mary uses approximately $27.89 on gas weekly
(b.) if nothing changes how much should Mary budget 
For 3 weeks she should use {{{3(27.89)=83.67}}}
Mary should budget approximately $83.67

Happy Calculating!