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Vlada [557]
3 years ago
7

Which expression is a perfect cube?

Mathematics
1 answer:
Blizzard [7]3 years ago
5 0

Answer:

The answer is b

Step-by-step explanation:

I just took the quiz

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Please help 25v^2-20vx+4x^2
Marina CMI [18]
25v^2-20vx+4x^2 \\ \\ (5v)^2 - 2(5v)(2x) + (2x)^2 \\ \\ (5v - 2x)^2 \\ \\

The final result is: (5v - 2x)<span>² </span>
7 0
3 years ago
The sum of eight and twice a number is 42
saveliy_v [14]

Answer:

8 + 2n = 42

Step-by-step explanation:

the sum of eight:   ___+ 8

and twice(2) a number(could be any variable but for now i choose n):   <u>2n</u> + 8

is 42 (literally mean it equals 42):    <u>2n</u> + 8 = 42

4 0
3 years ago
Maggie was doing research for her Ph.D. in physics when a 12 mg sample of radioactive material decayed to 3 mg in 26 minutes. De
netineya [11]

The general way to work this out is to solve the general expression for
the remaining quantity versus half-life, using logarithms.  But that's not
necessary with these numbers.

Look at the numbers:

-- 3 mg is  1/4  of  12 mg.

-- 1/4  is the product of  (1/2) x (1/2).

-- So the  3 mg is what's left of  12 mg after  2  half-lives.
The  26  minutes must be two half-lives.

-- The half-life of that substance is  26/2 = <em>13 minutes</em>.

Go Maggie !

3 0
3 years ago
Volume of a cube is 1728 cm3.Find its surface area​
Leno4ka [110]

Answer:

<h2>a=V⅓=1728⅓≈12</h2><h2 />

Step-by-step explanation:

<h2>Using the formula</h2><h2>V=a3</h2>

<h2>it is right answer </h2><h3>hope it will help you </h3>
8 0
3 years ago
Find the mean absolute deviation of the set of data 3,8,10,12,15
klio [65]
3 + 8 + 10 + 12 + 15 = 48

48 / 5 = 9.6 or 10

3 - 7
8 - 2
10 - 0
12 - 2
15 - 5

7 + 2 + 0 + 2 + 5 = 16

16 / 5 = 3.2 or 3

The Mean Absolute Deviation is approximately 3

Post brainliest if this helped :D
4 0
3 years ago
Read 2 more answers
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