X will be the speed of species b and 4x will be the speed of species a:
x + 4x = 180
5x = 180
x = 180 / 5
x = 36 m/h
If species b has a speed of 36 m/h, the speed of species a is 4 times that:
4 x 36 = 144 m/h.
Answer:

Hope it helped,
Happy homework/ study/ exam!
It mean 40 because it is in the tens place
~Jz
Answer:
3/8
Step-by-step explanation:
75% or 0.75 is equivalent to 3/4
3/4 times 1/2 equals 3/8
Answer:2.7=n
Step-by-step explanation:
n+27=11n
Move the variable to one side so subtract n
27=10n
Divide by 10
2.7=n
I'm not sure if this what you were asking for
3/5 both 12 and 20 can both be divided by 4