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Serjik [45]
3 years ago
10

A scuba diver is swimming 15 feet below the water’s surface.

Mathematics
1 answer:
pogonyaev3 years ago
8 0

Answer:

-3.2

Step-by-step explanation:

4 times .5 is 2. Then .4 times 3 is 1.2. add 2 and 1.2 and get 3.2.

Hope this helps and good luck :)

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Below are I assume the choices, it can be found elsewhere:

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ASHA 777 [7]

Answer:

(-6,4)

Step-by-step explanation:

The equations are:

x^2+4y^2=100\\4y-x^2=-20

Solving for x^2 of the 2nd equation and putting that in place of x^2 in the 2nd equation we have:

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Now we can solve for y:

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So plugging in y = 4 into an equation and solving for x, we have:

x^2=4y+20\\x=+-\sqrt{4y+20} \\x=+-\sqrt{4(4)+20} \\x=+-\sqrt{36} \\x=6,-6

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The pairs would be

(6,4) & (-6,4)

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