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hram777 [196]
3 years ago
9

Plplpl solve the answer​

Mathematics
1 answer:
11111nata11111 [884]3 years ago
4 0

Given:

The expression is:

\sqrt[3]{\dfrac{-512}{729}}

To find:

The value of the given expression.

Solution:

We have,

\sqrt[3]{\dfrac{-512}{729}}

It can be rewritten as

=\sqrt[3]{\dfrac{(-8)\times (-8) \times (-8)}{9\times 9\times 9}}

=\sqrt[3]{\dfrac{(-8)^3}{9^3}}        [\because a^ma^n=a^{m+n}]

=\sqrt[3]{\left(\dfrac{-8}{9}\right)^3}        [\because \dfrac{a^m}{b^m}=\left(\dfrac{a}{b}\right)^m]

=\dfrac{-8}{9}        [\because \sqrt[n]{x^n}=x]

The value of given expression is \dfrac{-8}{9}.

Therefore, the correct option is b.

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I am thinking of a number. When I double my number and then subtract the result from five, I get negative one. What is my number
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Answer:

3

Step-by-step explanation:

To turn the word problem into an equation, when we read:

"I am thinking of a number" we write "x"

"when I double my number" we write "2x"

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Now we solve for the number, which is x.

<em>Equation: </em>-1 = 5 - 2x

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subtract 5 from both sides

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divide both sides by -2

3 = x

<h3>There we go! The number is </h3><h2>3</h2>

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