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Brrunno [24]
3 years ago
9

PLEASE HELP ASAP

Mathematics
1 answer:
Reika [66]3 years ago
5 0

Answer:

  • 14

Step-by-step explanation:

<u>Twice the sum of a number and seven is three times the number:</u>

  • 2(x + 7) = 3x
  • 2x + 14 = 3x
  • 3x - 2x = 14
  • x = 14
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Thank you if you help
elena-s [515]
So the second question asks about the perimeter of a rectangular pool and the answer for that is W=87m.

I don’t know about the first question sorry but I’ll try figuring it out.
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3 years ago
20.3 is 4 times as large as some number. What is the number?
neonofarm [45]
The answer would be 81.2 because all you gotta do it 20.3 times 4

7 0
3 years ago
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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
The system has how many solutions?
mafiozo [28]

Answer:

1 solution

Step-by-step explanation:

It's only 1, because the two lines intersect in one spot only.

4 0
3 years ago
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tatiyna
If Ian uses 1/20 of the ketchup 4 times, this is equal to 4/20, or \frac{4}{20}.

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0.2 x 12.2 = 2.44 - however, this is how much he has used, and we need to figure out how much is left.

12.2 - 2.44 = 9.76

So, Ian has 9.76 oz remaining :)

4 0
3 years ago
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