Answer:
let the number of cows = x
let the number of chickens = y
since there are 42 heads:
x + y = 42
and since a cow has 4 legs, and a chicken has 2
4x + 2y = 144
from first equation:
x + y = 42
x = 42 - y (now, we will substitute this in the second equation)
4(42 - y) + 2y = 144
168 - 4y + 2y = 144
2y = 168 - 144
2y = 24
y = 12
now, we know the number of chickens. we will replace y with 12 in the first equation since it is more simpler
x + 12 = 42
x = 30
So, there are 30 cows and 12 chickens
Brainly it if you find the answer helpful
Everyone in the assembly line had 1 job.
Answer: 7.7 miles
Step-by-step explanation:
2.5x + 5.75 = 25 (<em>x = each mile traveled)</em>
2.5x = 25 - 5.75
2.5x = 19.25
x = 7.7 miles
Answer: ?
Step-by-step explanation:
