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3 years ago

Can someone help me? I will mark brainliest!

Mathematics

1 answer:

Tcecarenko [31]3 years ago

7 0

If you work the exponents using laws of indices, they give the same result.

4.2 × 10⁹/ 1.4 x 10⁴ 4.2 × 10²/ 1.4 × 10^(-3)

using laws of indices...

since they are of the same base subtract the powers..

= 10^(9-4) = 10^(2-(-3))

= 10⁵ = 10^ (2+3) = 10⁵

3.0 × 10⁵

30,000.

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3 years ago

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3 years ago

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Step-by-step explanation:

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3 years ago

Simplify the expression: w2 + 7w2 + 8w - 5 + 9 - 2w2

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<h3> $6w^2 +8w +4$ is the simplified expression</h3>

<em><u>Solution:</u></em>

Given that,

We have to simplify

$w^2 + 7w^2 + 8w -5+9-2w^2$

We can simplify the above expression by combining the like terms

Like terms are terms that has same variable with same exponent and same or different coefficient

From given,

$w^2 + 7w^2 + 8w -5+9-2w^2$

Group the like terms

$w^2 + 7w^2 -2w^2 + 8w - 5+9\\\\Combine\ the\ like\ terms\\\\6w^2 +8w -5+9\\\\Combine\ the\ constants\\\\6w^2 +8w +4$

Thus the given expression is simplified

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3 years ago