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3 years ago

The polynomial X3+ 8 is equal to

Mathematics

1 answer:

shtirl [24]3 years ago

4 0

Answer:

(x + 2)(x² - 2x + 4)

Step-by-step explanation:

x³ + 8 ← is a sum of cubes and factors in general as

a³ + b³ = (a + b)(a² - ab + b²), thus

x³ + 8

= x³ + 2³

= (x + 2)(x² - 2x + 4)

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Write an equation of the line containing the point (3,1) and perpendicular to the line 5x-3y=5

dusya [7]

Th answer is: y=-1/5x+8/5

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3 years ago

What is the area of a sector with a central angle of 8 π/11 radians and a radius of 7.2 ft? use 3.14 for π and round your final

coldgirl [10]

Answer:

$59.19 ft^2$

Step-by-step explanation:

step 1

Find the area of the circle

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=7.2\ ft$

$\pi =3.14$

substitute

$A=(3.14)(7.2)^{2}$

$A=162.78\ ft^2$

step 2

we know that

The area of a circle subtends a central angle of 2π radians

using proportion

Find out the area of a sector with a central angle of 8 π/11 radians

$\frac{162.78}{2\pi }\frac{ft^2}{rad} =\frac{x}{(8\pi/11)}\frac{ft^2}{rad} \\\\x=162.78(8/11)/2\\\\x=59.19\ ft^2$

7 0

3 years ago

What is the solution of 5y + 2 = 42?

Vlad1618 [11]

The answer is y = 8 from the photo

4 0

3 years ago

Read 2 more answers

Solve the right triangle

yan [13]

Answer: IXL is meant to be a practice

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2 years ago

What is the hypotenuse of a triangle with 4 ft and 5 ft

sergeinik [125]

Answer:

$\Large\text{The hypotenuse is}\ \sqrt{41}\ ft\approx6.4\ ft$

Step-by-step explanation:

$\text{Use the Pythagorean theorem:}$

$a^2+b^2=c^2$

$\text{a, b - legs}\\\text{c - hypotenuse}$

$\text{We have the legs 4ft and 5ft. Substitute:}$

$c^2=4^2+5^2\\\\c^2=16+25\\\\c^2=41\to c=\sqrt{41}$

8 0

3 years ago