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mojhsa [17]
3 years ago
14

Answer the 21st one. this question is from the chapter exponents and powers.

Mathematics
1 answer:
Mila [183]3 years ago
4 0

Answer: 729


Step-by-step explanation:

Move items with negative exponents from numerator to denominator or vice versa and change sign of exponent. Factorize composite numbers, say 10^3 = 2^3 × 5^3 and 81 = 3^4. Combine factors with same base, adding exponents. Cancel factors appearing in both numerator and denominator, subtracting exponents.


5^-3×6^-5×81×4/(3^-7×10^-3)

= 3^7×10^3×81×4/(5^3×6^5)

= 3^7×2^3×5^3×3^4×2^2/(5^3×2^5×3^5)

= 2^5×3^11×5^3/(2^5×3^5×5^3)

= 3^6

= 729


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a_sh-v [17]

The top is a triangle with sides 7 and 5.4 Use the Pythagorean theorem to find the 3rd length.

3rd sides = sqt(7^2 + 5^2( = sqrt(49+25) = sqrt(74)

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The dotted line is the hypotenuse of a right triangle.

Use the Pythagorean theorem to solve.

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The dotted line = sqrt(174)

8 0
2 years ago
Need help with this question
vampirchik [111]

The slope of line s is; (0 - a)/(c - 0) = -a/c

<h3>What is the Slope of the Line?</h3>

The formula for slope of a line is;

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For coordinates of two points labelled as; (x1, y1) and (x2, y2).

Thus, for the line s given on the graph, we can say that;

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Read more about Slope of Line at; brainly.com/question/3493733

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3 0
1 year ago
An astronaut is working on a satellite 200 miles above the ground. What is the measure of BD⌢, the portion of Earth that the ast
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Step-by-step explanation:

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What is the final amount if 1235 is increased by 4% followed by a 4% decrease?​
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Answer:

Step-by-step explanation:

Because firstly, it is increased by 4% but tge same is followed by a 4% decrease. So the final amount will be 1235

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2 years ago
74y−8−78y=−4y−8 how many solutions
Vera_Pavlovna [14]

Answer:

there is an  infinet amount of answers.

Step-by-step explanation:

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