Answer:
6840
Step-by-step explanation:
Here, the order matters (1st, 2nd, and 3rd), so we need to use permutations.
There are 20 people who can get in first place. After that, there are 19 people who can get in second place. Finally, there are 18 people who can get in third place. So:
20 * 19 * 18 = 6840
Step-by-step explanation:
6)
7)
8)
9)
9514 1404 393
Answer:
-13 < x ≤ 4
Step-by-step explanation:
The round bracket means the lower limit is not included in the interval. The square bracket means the upper limit is included.
-13 < x ≤ 4
1 to 45 is 45
90 divided by 2 is 45
135 divided by 4 is 45
180 divided by 4 is 45
all of them have the same relationship and a proportional to each other
