Answer:
answer: 4.5
Step-by-step explanation:
2x=3+6
2x=9
x=9/2
x=4.5
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!
All you have to do is substitute one linear equation into the other one.
So, essentially you will have 2 linear equations side by side each other.
8/5x - 1 = -4/3x - 1
-1 = -4/3x - 8/5x - 1
The solution eventually equals 0.
My GUESS would be a year and 3/4 so almost two years in it would be 25% covered. Just a guess though.
Answer:
30/54
Step-by-step explanation:
1st make and equation so 5/9=x/54
now cross-multiply.
5/9=x/54
(5)*(54)=x*(9)
270=9x
you can flip the equation.
9x=270 (next divide both sides by 9)
x=30
so 30/54=5/9
hope this helps :)