How many 3 digit numerical passowords are there if a digit can be repeated?
1 answer:
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Answer:
9
Step-by-step explanation:
Using the rule of radicals
×
⇔
Simplify the radicals
=
= ×
= 2
=
= ×
= 3
Then
3 +
= 3(2 ) + 3
= 6 + 3
= 9
Answer:
8) answer=5 9)answer=15
Step-by-step explanation:
all you have to do is replace in the following formula
Where
X1: is the first number of the first point
Y1: is the second number of the first point
X2: is the first number of the second point
Y2: is the second number of the second point
you replace in the formula and solve
I attach solution
