Answer:
D
Step-by-step explanation:
EDGE
Answer:
x = 49
Step-by-step explanation:
x + 14 = 63
x = 63 - 14
x = 49
Answer:

Step-by-step explanation:
Let v be the speed after the collision of both the cars.
Now, momentum is given by: mass × velocity, then by equating the total momentum before and after the collision of the two cars, we get

⇒
⇒
⇒
Thus, they are moving at the velocity of 
Answer: 3 or 9
Step-by-step explanation:
either 3 because of the different marbles or 9 because of total