There are 3,360 combinations to choose from if the lock is from 0-15.
I'd suggest you enclose -1 and 5 within brackets as shown:
4( 2[-1] - [5] ). Do the work within parentheses FIRST: 4( -7 ).
Then multiply as indicated: -28
Answer:
x = 22
Step-by-step explanation:
22 x 4 = 88
She would have sold 45 tickets on the first day
