Mrs. hall has a balance of $450 in her student account. she spends $15 each week on snacks for the after school meetings. if mrs. hall has $180 remaining in the account at the end of the semester, how many weeks are in the semester?

18 weeks

Step-by-step explanation:

Let the number of weeks be represented by a variable x;

Beginning balance = 450

Ending balance=  180

Amount spent per week= 15

Amount spent in x weeks = 450-180= $270

Total amount spent in x weeks = 15*x = 15x

Equate the above equations to the corresponding dollar amount;

15x=270

Next, solve for x by dividing both sides by 15

x=270/15

x= 18

Therefore, there are 18 weeks in the semester.

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step-by-step explanation: