Answer:
10000 options
Step-by-step explanation:
There are 10 options of digit from 0 to 9. It means there are 10 options for the first slot, 10 for the 2nd slot, 10 for the 3rd slot, and 10 for the last slot of each of the 4 slots of the password. For all 4 passwords the total amount of choices would be

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6x5=30
3x10=30
6+3=9
Hope it helps
Answer:
x - 8
Step-by-step explanation:
Plug in -1 for x and you get x - 8
7 2
12 5
Do the reciprocal!
7 5
12 2
And just multiply and you get 35/24