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Maru [420]
3 years ago
12

1) A farm has chickens and cows. You ask the farmer how many chickens he has, and how many cows he has. The farmer tells you he

has 28 healthy animals, and they have a total of 64 legs. How many of his animals are cows?
2) Andrew has a collection of soda bottles. Some of them are 12-ounce bottles, and others are 16-ounce bottles. If the collection contains 20 bottles which hold a combined 300 ounces, how many of the soda bottles are 12-ounce bottles?

Need two variables and two equations for each. It also needs to be solved.
Mathematics
1 answer:
Luden [163]3 years ago
5 0
1. c=cows b=chicens c+b=28 chicen has 2 legs cow has 4 legs 4c+2b=64 c+b=28 4c+2b=64 multiply first equaiton by -2 and add to second -2c-2b=-56 4c+2b=64 + 2c+0b=8 2c=8 divide 2 c=4 sub c+b=28 4+b=28 minus 4 b=24 4 cows and 24 chicens 2. t=twelve oz s=sixteen oz t+s=20 12t+16s=300 find t multiply first equation by -16 -16t-16s=-320 add to first equation -16t-16s=-320 12t+16s=300 + -4t+0s=-20 -4t=-20 divide -4 t=5 five 12 oz bottles 1. 4 cows, 24 chicen 2. 5 twelve oz bottles
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G(f(12))
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4 0
3 years ago
What percentage is 15 out of 17?
Ket [755]
88.23%

Simply plug 15/17 into you calculator 

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and your done :) this works for any similar problems

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8 0
3 years ago
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Tcecarenko [31]

Answer:

9

Step-by-step explanation:

6/2(1+2)

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8 0
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3. The area of a square garden is 200 m2. How long is the diagonal?
Step2247 [10]

The answer and explanation in the pic below

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3 0
3 years ago
Convert:<br> 38 inches = feet and inches all together
kirza4 [7]

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38-36

8 0
3 years ago
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