Question

Jacob earned $80 babysitting and deposited the money into his savings account. The next week he spent $85 Lon video games. Use integers to describe the weekly changes in Jacob's savings balance.

Answer 1

After one week, Jacob has earned $80 from babysitting, so his change is an increase of $80.  The next week, he spends $85, so he experiences a decrease of $85.  Over the two weeks, his overall change is $80-$85=-$5, or a decrease of $5.