Answer:
<em>(a), (d)</em>
Step-by-step explanation:
Answer:
504 combos
Step-by-step explanation:
Cannot use digits twice and last is '7'
9 digits for first place choice
8 digits for second place
7 digits for third place
only '7' for fourth place 9 x 8 x7 = 504 combos
Answer:
9F
Step-by-step explanation:
-5...-4...-3...-2...-1...0...1...2...3
Y + 5 = 0
y >= -5
Therefore, you would choose the first answer.