Answer: 50 - 10m or 10(5 - m)
Explanation:
Since Lily starts a savings account with $50 and each month, m, she withdraws $10 from her account, the expression that can be used to determine the amount left in her savings account after a certain number of months will be:
= 50 - 10(m)
= 50 - 10m
For example, the amount that'll be left in her account after two months will be:
= 50 - 10m
= 50 - 10(2)
= 50 - 20
= 30
She'll have $30 in her account after two months.