3 years ago

What is 0.0000009/.03 in scientific notation?

Mathematics

1 answer:

meriva3 years ago

7 0

0.0000009 = 9 x 10^-7
.03 = 3 x 10^-2

9 x 10^-7/ 3 x 10^-2 = 3 x 10^-5

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ANSWER

A. (4,12)

EXPLANATION

The equations are:

$10x +2y = 64...(1)$

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$3x - 4y = -36...(2)$

To eliminate a variable we make the coefficients of that variable the same in both equations.

It is easier to eliminate x.

We multiply the first equation by 2 to get:

$20x + 4y = 128...(3)$

We add equations (2) and (3).

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$23x = 92$

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Put x=4 into equation (1).

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$2y = 64 - 40$

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$\frac{2y}{2} = \frac{24}{2}$

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The solution is (4,12)

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