First one I think I really don’t know
Answer:
No real solutions
Step-by-step explanation:
If you rearrange the equation:
33x - 33x = -99 - 99
0x = -198
Anything divided by zero is undefined/no real solution
He has to wait 13 minutes for the 7:18 train
The symbol ₁₂P₉ represents the permutations of 9 quantities out of 12.
By definition,

From the calculator,
12! = 479,001,600
3! = 6
Therefore
₁₂P₉ = 479001600/6 = 79,833,600
Answer: 79,833,600