I need help with this on my homework

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

The table shows the age and finish time of ten runners in a half marathon. identify the outlier in this data set. drag into the table the ordered pair of the outlier and a reason why that point is an outlier.

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.