Answer:
-1
Step-by-step explanation:
Initially, Ball A of 10 kg will have velocity x, while Ball B of 30 kg has velocity -10 m/s.
After collision, Ball A will have a velocity of -30 m/s, while Ball B will have velocity 10 m/s. We assume their masses do not change.
(10 kg)(x m/s) + (30 kg)(-10 m/s) = (10 kg)(-30 m/s) + (30 kg)(10 m/s)
10x - 300 = -300 + 300
x = 30 m/s (to the right)
Answer:840,400
Step-by-step explanation:840,449
840,400
Rmember that the form y = mx + b is a straight line whose y-intercept is b and slope is m.
On the graph you can see that the y-intercept is beteween 0 and 5.
The equations given as options have y-intercepts 6, 20, 18, and 3, in that order.
And the only equation of the options that meet that is the option D. y = 3x + 3.
You can also check that the slope of that equation is 3 and it is roughly the slope of an intermediate line between the dots.
Answer: option D. y = 3x + 3.
