3 years ago

Please help thank you so much

Mathematics

1 answer:

pogonyaev3 years ago

6 0

30% of the fish returned to the water. You simply divide 12 by 40.

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Will give brainliest!!

Akimi4 [234]

Answer: 942

Step-by-step explanation: 20 x 3.14 = 62.8 62.8 x 15 = 942

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4 years ago

To solve for 51 x 4, Tamara used mental math by thinking about 51 + 51 + 51 + 51. Which best describes the strategy she used to

sergey [27]

Its faster in adding isn't always right when you are multiplying numbers

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3 years ago

<img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B28%20%7D%20%20%2B%20%20%5Csqrt%7B343%7D%20%20%5Cdiv%202%20%5Csqrt%7B63%20%7D%20"

Nadusha1986 [10]

Answer:

Step-by-step explanation:

sqrt(28): sqrt(4*7)

sqrt(4) = 2;

sqrt28)=2*sqrt(7)

sqrt(343): sqrt(7 * 7 * 7) = 7 * sqrt(7)

Note: the rule is if you have 3 equal primes under the root sign, you leave one, you throw one away, and you put one outside the root sign.

2 sqrt(63) = 2 sqrt(3*3*7) The above rule gets modified to throw 1 three away and take the other one outside the root sign.

2sqrt(63) = 2*3 sqrt(7)

Numerator: 2*sqrt(7) + 7sqrt(7) = 9sqrt(7)

9sqrt(7)

======

6 sqrt(7)

3/2

Note without brackets I cannot be certain that I have interpreted this correctly. The division only apply to sqrt(343) / 2 sqrt(63). If this is so please leave a note.

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4 years ago

The Challenger Deep. the deepest known part of the

disa [49]

Answer: 36,000

Step-by-step explanation: I did the math

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3 years ago

Simplify. (-2)^-3 <br> ?????

Licemer1 [7]

Remember
$(ab)^c=(a^c)(b^c)$ and
$x^{-m}= \frac{1}{x^m}$
so
$(-2)^{-3}= \frac{1}{(-2)^3}= \frac{1}{(-1)^3(2)^3}=\frac{1}{(-1)(8)}=\frac{1}{-8}=\frac{-1}{8}$

3 0

3 years ago