Answer:
The particles collide when t = 7 at the point (49, 49, 49).
Step-by-step explanation:
We know the trajectories of the two particles,

To find if the tow particles collide you must:
- Equate the x-components for each particle and solve for t

The solutions to the quadratic equation are:

- Equate the y-components for each particle and solve for t

The solutions to the quadratic equation are:

- Equate the z-components for each particle and solve for t

The solutions to the quadratic equation are:

Evaluate the position vectors at the common time. The common solution is when t = 7.

For two particles to collide, they must be at exactly the same coordinates at exactly the same time.
The particles collide when t = 7 at the point (49, 49, 49).
Answer:
Let me know if you need explanations
100+70=170
170/10=17
Millie can make 17 trains of 10 cubes.
There are many for this ,but one sample is: 2 divided by 2is 4 X 3 which is 12.