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choli [55]
2 years ago
7

Which is the simplified form of

Mathematics
2 answers:
ahrayia [7]2 years ago
5 0

For this case, we must simplify the following expression:

r ^ {- 7} + s ^ {- 12}

By definition of power properties we have to:

a ^ {- 1} = \frac {1} {a ^ 1} = \frac {1} {a}

So, rewriting the expression we have:

\frac {1} {r ^ 7} + \frac {1} {s ^ {12}}

Answer:

\frac {1} {r ^ 7} + \frac {1} {s ^ {12}}

Option D

Rufina [12.5K]2 years ago
4 0

Answer:

 1           1

------ + -------    

r^7      s^12

Step-by-step explanation:

r^(-7) + s^(-12) can be re-written as

 1           1

------ + -------    by putting to use the rule:

r^7      s^12

                1

x^(-a) = ----------

              x^a

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A metalworker has a metal alloy that is 20​% copper and another alloy that is 60​% copper. How many kilograms of each alloy shou
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<h3>Answer:</h3>
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