For this case we have the following equation:

Where, we have the following variables:
x: time in seconds
y: speed in feet per seconds
For the initial velocity, we evaluate x = 0 in the given equation:

Therefore, the initial speed is 12 feet per second.
Answer:
The particle's initially velocity is 12.
Answer:
(B) x + 4y = 7
Step-by-step explanation:
The answer is B.
I hope this helps. :)
Answer:
a) 75/3=25/1
Step-by-step explanation: