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vichka [17]
2 years ago
12

Find the cube root of 512​

Mathematics
1 answer:
Andru [333]2 years ago
6 0

Answer:

the answer is 8

Step-by-step explanation:

cube root of 512 is 8

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A rectangular prism is 4 meters long, 5 meters wide and has a hight of 7 meters what is it's volume?
Salsk061 [2.6K]

Answer:

A. 140

Step-by-step explanation:

width times height times length

5·7·4=140

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A garden snail moves<br> 3/5<br> foot in 1/4<br> hour. How far is the snail moving per hour?
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Answer: 12/5 or 2.4 feet per hour

Step-by-step explanation:

\frac{3}{5} * 4 = 12/5

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Complete the steps to solve the polynomial equation x3 – 21x = –20. According to the rational root theorem, which number is a po
jeka94

Answer:

Zeroes : 1, 4 and -5.

Potential roots: \pm 1, \pm 2, \pm 4, \pm 5, \pm 10, \pm 20.

Step-by-step explanation:

The given equation is

x^3-21x=-20

It can be written as

x^3+0x^2-21x+20=0

Splitting the middle terms, we get

x^3-x^2+x^2-x-20x+20=0

x^2(x-1)+x(x-1)-20(x-1)=0

(x-1)(x^2+x-20)=0

Splitting the middle terms, we get

(x-1)(x^2+5x-4x-20)=0

(x-1)(x(x+5)-4(x+5))=0

(x-1)(x+5)(x-4)=0

Using zero product property, we get

x-1=0\Rightarrow x=1

x-4=0\Rightarrow x=4

x+5=0\Rightarrow x=-5

Therefore, the zeroes of the equation are 1, 4 and -5.

According to rational root theorem, the potential root of the polynomial are

x=\dfrac{\text{Factor of constant}}{\text{Factor of leading coefficient}}

Constant = 20

Factors of constant ±1, ±2, ±4, ±5, ±10, ±20.

Leading coefficient= 1

Factors of leading coefficient ±1.

Therefore, the potential root of the polynomial are \pm 1, \pm 2, \pm 4, \pm 5, \pm 10, \pm 20.

3 0
3 years ago
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