The number of permutations of the 25 letters taken 2 at a time (with repetitions) is:

The number of permutations of the 9 digits taken 4 at a time (with repetitions) is:

Each permutation of letters can be taken with each permutation of digits, therefore the total number of possible passwords is:
Answer:
Company A is 1.99 times B.
Step-by-step explanation:
Company A charges:
Company B charges:
We just need to divide A by B:

Therefore, company A is 1.99 times B.
I hope it helps you!
Answer:
x=-10
Step-by-step explanation:
3x-4(2+3x)=82
3x-(4*2)+(4*3x)=82
3x-8-12x=82
-9x-8=82
-9x-8+8=82+8
-9x=90
-9x/-9=x
90/-9=-10
x=-10
Answer:
A: 3
Step-by-step explanation:
Hopefully this helps!