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3 years ago

Please help exponents and scientific notation

Mathematics

1 answer:

Anna007 [38]3 years ago

6 0

Alright! When you have a constant to a power times another constant to a power (ex. [x^3 times x^3] ) you simply add the powers and keep the base [x^6]. When you have a power to a power (ex. [(12^3)^3] ) you multiply the powers and keep the base [12^9]. When you have a constant to a power divided by a constant to a power (ex. [ x^2 divided by x^5] ) you subtract the powers and keep the base. It's hard to see the questions, so I'll leave this here for you to use as a guide.

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Answer:

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Step-by-step explanation:

Given three linear equation as :

6 x - y + z = - 3 ......A

4 x - 3 z = - 13 ......B

2 y + 5 z = 15 ......C

Solving eq A and C

I.e 2× (6 x - y + z ) = -3 ×2

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So, ( 12 x - 2 y + 2 z ) + ( 2 y + 5 z) = - 6 + 15

Or, 12 x + 7 z = 9 ......D

Solving eq B and D

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I.e x = - 1

Now, Put The value of z in eq C

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or, 2 y + 5 × 3 = 15

Or, 2 y = 15 - 15

or, 2 y = 0

∴ y = 0

Hence The solution of the equation are x = - 1 , y = 0 and z = 3 Answer

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