Old mcdonald has 100 chickens and goats in the barnyard. altogether, there are 284 feet. how many chickens and how many goats are in the barnyard?

58 chickens, 42 goats

Step-by-step explanation:

there are a total of 100 chickens and goats

c + g = 100c = 100 - g

there are 284 feetchickens have 2 feet and goats have 4 feet

2c + 4g = 284

2(100 - g) + 4g = 284

200 - 2g + 4g = 284

-2g + 4g = 284 - 200

2g = 84

g = 84/2

g = 42 < goats

c + g = 100

c + 42 = 100

c = 100 - 42

c = 58 < chickens

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm