Let´s:
t=time when the both runners coincide.
velocity=distance/time ⇒ distance=velocity x time
distance traveled by Christy=0.12 t
distance traveled by Cindy=0.22 t
Becuse Christy starts the race with an advantage of 1.5 km de distance from Cindy´s position the distance would be : 0.12 t + 1.5
We would have to solve the following equation:
0.12t+1.5=.0.22t
0.22t-0.12t=1.5
0.1t=1.5
t=1.5/0.1
t=15
Answer: In 15 minutes Cindy will catch Christy
It would be 220 because 20 students in all, 20×20 is the 400 students. so if you just multiplied the 9 and 11 by 20, it would match up with 400 students and you would have 220 girls. (This is not how most people work this out, but I hope it helped).
4x+3 = 2x + 9
4x-2x=9-3
2x=6
x=6/2
x=3
Answer:
The data is symmetrical
Step-by-step explanation:
In order for the data to be symmetrical, the mean and median have to be the same number, if they're not, then the data is skewed one way or another.
Hope this helps and have a good day/night!