The farm animals have been sorted into cows and chickens. the number of chickens is two less than five times the number of cows. the animals are 80% chickens. how many cows are there?
a. 1
b. 2
c. 3
d. 4

Option b

Step-by-step explanation:

Let's call x the number of cows and call y the number of chickens. Then we know that:

The number of chickens is two less than five times the number of cows. This means that:

We also know that:

The animals are 80% chickens.

This means that:

To find the number of cows we must solve the system of equations:

Replace the first equation in the second equation:

Now solve for the variable x

step-by-step explanation:

f(gx)=f(1/x+2)

=(1/x+2)+2

=(1+2x)/2+2

=(1+2x+4)/2

= (2x+5)/2