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Alla [95]
3 years ago
15

What is the value of -2 (7-15) over 4

Mathematics
1 answer:
Citrus2011 [14]3 years ago
4 0
The answer to the question is: 4
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A farmer owns pigs, chickens, and ducks. When all her animals are together, she has 30 feathered animals, and the animals all to
tatiyna

To solve this problem, let us first assign some variables. Let us say that:

x = pigs

y = chickens

z = ducks

 

From the problem statement, we can formulate the following equations:

1. y + z = 30                                         ---> only chicken and ducks have feathers

2. 4 x + 2 y + 2 z = 120                      ---> pig has 4 feet, while chicken and duck has 2 each

3. 2 x + 2 y + 2 z = 90                        ---> each animal has 2 eyes only

 

Rewriting equation 1 in terms of y:

y = 30 – z

Plugging this in equation 2:

4 x + 2 (30 – z) + 2 z = 120

4 x + 60 – 2z + 2z = 120

4 x = 120 – 60

4 x = 60

x = 15

 

From the given choices, only one choice has 15 pigs. Therefore the answers are:

She has 15 pigs, 12 chickens, and 18 ducks.

3 0
3 years ago
What is the final amount if 784 is decreased by 1% followed by a 4% increase?
Ilya [14]

Answer:

3136

Step-by-step explanation:

Thats the answer please I don't have time to write the explanation

5 0
3 years ago
HELP ASAP!!!<br> thanks if you helped!
Anton [14]

Answer:

G. \frac{11}{20}

Step-by-step explanation:

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2 years ago
Which of the following equations is equivalent to 3x + 4y = 15?
Ray Of Light [21]
Letter A is the answer because
4y = 15 - 3x
so y = 15/4 -3x/4
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3 years ago
What is the range of the function f(x)=6x+5 for the domain {-1,0,1,2,3}
bogdanovich [222]
{-1, 5, 11, 17, 23} ................
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