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3 years ago

Will reward with 25 points

Mathematics

2 answers:

Zina [86]3 years ago

7 0

The answer is below. X is greater than 8 and smaller than 24.

Alina [70]3 years ago

7 0

I think 9 or above because the length of two sides got to be greater than the other.

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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

4 years ago

Suppose a Pony Express rider was paid $192 for 12 weeks of work. If he was paid the same amount each week,how much was he paid f

Masteriza [31]

$192 divided by 12 is 16 so 16 x 3 is 48. That is your answer $48. Your welcome bud.

5 0

3 years ago

How to explain 3,482,000,000 in scientific notation

Gelneren [198K]

3.482 x 10^9.
-the coefficient must be under 10, and in this case it is the "3". Then you count the places after that to get your exponent

7 0

3 years ago

Read 2 more answers

15x+8=6x+2<br><br> Find X please I beg you I have to feed my kids

Rzqust [24]

Answer:

$15x+8=6x+2\\9x+8=2\\9x=-6\\x=-6/9 or -2/3\\Hope this helps plz hit the crown :D$

4 0

3 years ago

Read 2 more answers

NEED HELP ASAP PLEASE WILL GIVE BRAINLIEST:

CaHeK987 [17]

Answer:

True.

Here, radius of the sphere = radius of the cylinder = r

Diameter of the sphere = height of the cylinder = 2r

Surface area of the sphere = 4πr2

Curved surface area of the cylinder = 2πr (2r) = 4πr2

Step-by-step explanation:

5 0

2 years ago