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katrin2010 [14]
2 years ago
10

I will mark you. i need help fast thank you!

Mathematics
1 answer:
Ganezh [65]2 years ago
5 0

Answer:

If I'm correct it should be the second one

Step-by-step explanation:

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Simplify the expression. Write your answer as a power.<br><br> (−5/7)^8⋅(−5/7)^9
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Answer: (-\frac{5}{7})^{17}

Step-by-step explanation:

The expression can be simplified by applying the a properties of exponents, specifically the Product of powers, which states that:

(b^a)(b^c)=b^{(a+c)

Where b is the base and a and c are exponents.

 Then simplify it by rewriting the base (-\frac{5}{7}) and adding the exponents of the expression (8 and 9).

You will get the expression simplified and written as a power:

(-\frac{5}{7})^8(-\frac{5}{7})^9=(-\frac{5}{7})^{(8+9)}=(-\frac{5}{7})^{17}

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