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1 year ago

Help me please.I am in need of help HURRY!!

Mathematics

2 answers:

skelet666 [1.2K]1 year ago

8 0

Answer:

AC = 10

Step-by-step explanation:

We can apply the properties of two secants intersecting outside a circle

(see attached for reference).

in our case, our formula will be

BC (BC + AB) = CD (CD + DE), which can be written as:

BC · AC = CD · CE

We are given:

BC = 6, DC = CD = 5, CE = 12

simply substitute the known values into the equation above

6 · AC = 5 · 12

AC = (5)(12) / 6

AC = 10

Svet_ta [14]1 year ago

5 0

Answer:

Step-by-step explanation:

(Note that the diagram is not to scale)

You know BC is 6

You know DC is 5

You know CE is 12

Using K's position, it shows that AC is one off from EC

AC=11

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Which figure will tessellate the plane? A. regular pentagon B. regular decagon C. regular octagon D. regular hexagon

Harrizon [31]

<h3>Answer: D. regular hexagon</h3>

A hexagon is composed of 6 congruent equilateral triangles. Each equilateral triangle has interior angle of 60 degrees. Adding 6 such angles together gets you to 360 degrees. So we've done one full rotation and covered every bit of the plane surrounding a given point. Extend this out and you'll be able to cover the plane. A similar situation happens with rectangles as well (think of a grid, or think of tiles on the wall or floor)

In contrast, a regular pentagon has interior angle 108 degrees. This is not a factor of 360, so there is no way to place regular pentagons to have them line up and not be a gap or overlap. This is why regular pentagons do not tessellate the plane. The same can be aside about decagons and octagons as well.

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2 years ago

Solve the following system of equations by graphing and select the correct answer below:

JulijaS [17]

Answer: option c

Step-by-step explanation:

Find the x-intercept and y-intercept of each line.

To find the x-intercept, substitute $y=0$ into the equation and solve for "x".

To find the y-intercept, substitute $x=0$ into the equation and solve for "y".

- For the first equation:

x-intercept

$4x + 3y = 29\\\\4x + 3(0)= 29\\\\4x=29\\\\x=\frac{29}{4}\\\\x=7.25$

y-intercept

$4x + 3y = 29\\\\4(0) + 3y = 29\\\\3y=29\\\\y=\frac{29}{3}\\\\y=9.66$

Graph a line that passes through the points (7.25, 0) and (0, 9.66)

- For the second equation:

x-intercept

$2x - 3y = 1 \\\\2x - 3(0) = 1 \\\\2x=1\\\\x=0.5$

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$2x - 3y = 1\\\\2(0) - 3y = 1\\\\-3y=1\\\\y=-0.33$

Graph a line that passes through the points (0.5, 0) and (0, -0.33)

Observe the graph attached. You can see that point of intersection of the lines is (5,3); then this is the solution of the system. Therefore:

$x=5\\y=3$

7 0

2 years ago

Read 2 more answers

So i need some help about percentages.

Lisa [10]

The answer is 12. if you need help, do 60•.2

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2 years ago

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Determine the kinetic energy of a 100-kg roller coaster car that is moving with a speed of 20.0/ms.

rjkz [21]

Answer:

The kinetic energy is 20,000\ J

Step-by-step explanation:

The kinetic energy of a body is defined as:

$k = \frac{1}{2}ms ^ 2$

Where m is the mass of the roller coaster car

s is the speed and k is the kinetic energy

We know that $s = 20\ m/s$

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3 0

2 years ago

−10=2y Hello Help Me

marin [14]

The answer is -5

Explanation: Divide 2 to get rid of the top number. It looks like this

-10. 2y
___. ___

2. 2

What this does is remove the two from the Y and sets it by itself. Then you divide the -10, and the answer is -5

7 0

2 years ago

Help me please.I am in need of help HURRY!!​

Help me please.I am in need of help HURRY!!