Question

There are 10,000 dolphins swarming
for food. For each single dolphin on the surface, 20 are below the water. How many dolphins are on the surface? How many are below water?

Answer 1

Answer:

476; 9524

Step-by-step explanation:

There are 10,000 dolphins total.

We don't know how many dolphins are on the surface, so let's let x = the number of dolphins on the surface.

So, number of dolphins on the surface = x.

Since 20 dolphins are below the water for every x, there are 20x dolphins under the water.

So, number of dolphins below the water = 20x.

Now, we can set 10,000 equal to x + 20x.

So, x + 20x = 10,000.

Combine like terms.

21x = 10,000

Divide both sides by 21.

x ≈ 476

If x = 476, there are 476 dolphins on the surface.

Now we can subtract 476 from 10,000 to get the number of dolphins below the water, which is 9524.

There are 9524 below water.

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