The answer is 2.6 m/s
The speed (v) is distance (d) through time (t).
v = d/t
We know:
d = 390 m
t = 150 s
v = d/t
v = 390 m / 150s
v = = 2.6 m/s
a farmer poured 20 gallons of milk in a huge hole
The next day, he brought 10 more gallons but gave 3 gallons to his animals
Later that day, he brought 1/4 gallon
How much does he have
So firstly, you want to foil - (7v^4 + 6) [Think of the minus sign as -1]: 
Next, combine like terms and your answer will be: 
Answer:
3cm espero te sirva jajajajaja