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.

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation: