Answer:
3 steps per second.
Step-by-step explanation:
Find the Unit Rates of each going up and down:
--> 30/6 unit rate is 5 steps per second.
--> 30/15 unit rate is 2 steps per second.
Now subtract them to get the amount if the elevator wasn't moving:
--> 5-2= 3.
Answer: Left 2
Step-by-step explanation:
Move 2 units back which is left
Ans: 720
<span>This is equal to the number of different arrangements of three persons from a group of 10 persons </span>
Required number of ways = 10P3 = 720
OR can be solved in this way
select 3 runners (10C3 ways)
These 3 runners can be arranged in 3! ways
<span>Total = 10C3×3! = 720
</span>
5x = # of games won
2x = # of games lost
The total number of win and lose is 147.
5x + 2x = 147
Solve for x,
5x +2x=147
7x = 147
x=21
The ratio of games won: #of games lost is 5:2
5x21=105: 2x21=42
105 wins: 42 lost