4 years ago

Missing sides 14 ft. 20 ft.

Mathematics

1 answer:

Morgarella [4.7K]4 years ago

8 0

Answer:

8 maybe

Step-by-step explanation:

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In a pen of goats and chickens there are 25 heads and 90 feet. How many goats and chickens are in the pen.

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5 chickens, 20 goats

Step-by-step explanation:

We can set up two equations and use substitution

There are 25 total goats and chickens, so

$G + C = 25$

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$4G + 2C = 90\\$

By solving for G in the first equation,

$G = 25 - C\\$

We can now use substitution,

$G = 25 - C\\4G + 2C = 90\\4(25 - C) + 2C = 90\\100 - 4C + 2C = 90\\-2C = -10\\C = 5\\$

We have 5 chickens, so we have 20 goats.

Let's double check:

$5(2) + 20(4) = 90\\10 + 80 = 90\\90 = 90\\$

It checks out!

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