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Assoli18 [71]
3 years ago
12

The number of fish (F) in a fish tank increases when the number of plants (P) increases. Write the correct equation for this sce

nario, and solve for the number of fish when the number of plants is 3. Plants Fish 15 6 20 8
Mathematics
1 answer:
Kamila [148]3 years ago
5 0
I'm going to assume that the table looks like this:

Plants: 15 | 20
   Fish:  6  |  8

If this is what it looks like, then the equation is:

2F=5P, or F=2.5P

When you have 3 plants, then you can substitute and solve:

2F=5P --> 2F=5(3)     --Substitute
2F=5(3) --> 2F=15     --Multiply
2F=15 --> F=7.5     --Divide

The mathematical answer says 7.5 fish, but this answer might
be incorrect because we can clearly see that there are more plants than fish.

So, another method that you could use is to fill in the table:

Plants: 0 | 5 | 10 |15 | 20
   Fish: 0 | 2 |  4 |  6  |  8

We can see from the table that when there are 0 plants, there are 0 fish,
and when there are 5 plants, there are 2 fish. We know that 3 is 3/5 of 5,
so we can use this ration to find 3/5 of 2, to find the number of fish in the
tank when there are 3 plants.

3/5 of 2 ends up being 1.2, but it's impossible to have 1.2 fishes (yes,
fishes is indeed a word), so you should round down to the nearest whole
fish.

The answer is 1.
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Step-by-step explanation:

So lets use the process of elimantion to find the answer.

Firs off, we can tell that this is a greater/less than or equal to inequlaity, since there is a inclosed circle, not a open one. So this leaves the top left answer and bottem right answer.

Now, we can see that the graph is from 0-15. X is at 7.

This means its x+8, because the x would be smaller, or possibly even negatibe on this graph.

My theory that can better support my annwer is if we solve for  x:

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We can subtract 8 from both sides:

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And as we can see on the inequality, x is at 7 in the graph.

Hope this makes sense and helps!

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3 years ago
Please help ASAP thank youu!!
Gennadij [26K]

Answer:

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Step-by-step explanation:

Here you go, glad to help :)

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