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2 years ago

Describe and correct the error in naming opposite rays in the diagram

Mathematics

1 answer:

Dennis_Churaev [7]2 years ago

5 0

The true statement about the opposite rays is YC and YE are opposite rays.

<h3>How to describe and correct the error in naming opposite rays in the diagram?</h3>

The complete options are added as an attachment

Two rays are opposite rays, if:

Their names begin with the same name
If their arrows point to opposite directions

Using the above highlights as a guide, we have:

YC and YE are opposite rays
XB and XD are opposite rays

Hence, the true statement about the opposite rays is YC and YE are opposite rays.

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60 + 6 equals 13 + 5 p

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4 years ago

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M(4,6) =(x,y)

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3 years ago

Type the correct answer in each box. (____)

trapecia [35]

Answer:

1. -16; 2. +64; 3. 16

Step-by-step explanation:

The formula for the volume of a cylinder is

V = πr²x

Data:

r = (x - 8) mm

V = 1024π mm³

Calculations:

1. Find the cubic equation

V = πr²h

1024π = π(x - 8)² × x

Divide each side by π

1024 = x(x - 8)²

1024 = x(x² - 16x + 64)

1024 = x³ - 16x² + 64x

x³ - 16x² + 64x - 1024 = 0

2. Solve the cubic equation

The general formula for a third-degree polynomial is

f(x) = ax³ + bx² + cx + d

Your polynomial is

f(x) = x³ - 16x² + 64x - 1024

a = 1; d = -1024

According to the <em>rational roots theorem</em>, the possible roots are

factors of d/factors of a

Factors of d = ±1, ±2, ±4, ±8, ±16, ± 32, ± 64, ±128, ±256, ±512, ±1024

Factors of a = ±1

Potential roots are x = ±1, ±2, ±4, ±8, ±16, ± 32, ± 64, ±128, ±256, ±512, ±1024

That's a lot of possibilities to check by trial and error. I will just use the one that works.

Try x = 16 by synthetic division.

16|1 -16 64 -1024

1 0 64 0

So,

(x³ - 16x² + 64x - 1024)/(x – 16) = x² + 64

and

(x - 16)(x² + 64) = 0

x - 16 = 0 x² + 64 = 0

x = 16 x² = -64

x = ±8i

There is only one real root: x = 16 mm

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4 years ago