When a toy truck collides into a toy car, the momentum of is the same before and after the collision.
a. the truck
c. the truck times the car
b. the car
d. the truck plus the car?

d. the truck plus the car

Step-by-step explanation:

The law of conservation of momentum states that the momentum before collision is equal to the momentum after collision.

As such the addition of the momentum (the product of the mass and velocity) of the car and that of truck before collision is equal to the product of the sum of the masses of the car and truck and the velocity with which both move after collision.

The right answer is the truck plus the car.

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)