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3 years ago

Help 15 points (i have to write 20 characters so don't mind this )

Mathematics

2 answers:

NeX [460]3 years ago

7 0

The answe is A 112 square units

zvonat [6]3 years ago

6 0

Answer:

Step-by-step explanation:

First find the area of the entire figure.

L= 36

W = 20

Area = 36 * 20 = 720

Find the area of the left right triangle.

Height = 20

Base = 1/2 * 36 = 18

Just as an aside, let me be a little grumpy for a moment. You should never have to guess what a dimension is on a diagram. It's sloppy. However for this problem you have no choice. But you could think to complain to your teacher.

Area = 1/2 * base * height

Area = 1/2 * 18 * 20 = 180

Find the area of the bottom right triangle.

The height is 1/2 20 = 10

The base is 36

Area of the lower triangle = 1/2 * 36 * 10 = 180

Area of the shaded figure = 720 - 180 - 180 = 360

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Find the measure of an interior and an exterior angle of a regular 24-gon

Natalija [7]

Answer:

Exterior: 15 degrees Interior: 165 degrees

Step-by-step explanation:

All shape's exterior angles (total) equal 360 degrees. 360/24=15.

The formula for finding an interior angle is (n-2)*180/n. (24-2)*180/24=165

7 0

4 years ago

PLS ANSWER ITS URGENT

matrenka [14]

Answer:

The length of the ramp must be at least 14.71 feet

Step-by-step explanation:

Given

$BC = 2.3ft$

$\theta = 9^\circ$

<em>See attachment for complete figure</em>

Required

Length of the ramp (z)

To do this, we consider sin of angle A ( $\theta$ ).

So, we have:

$sin\theta = \frac{Opposite}{Hypotenuse}$

This gives:

$sin(9)= \frac{2.3}{z}$

Make z the subject

$z= \frac{2.3}{sin(9)}$

$z = \frac{2.3}{0.1564}$

$z = 14.71 ft$

<em>The length of the ramp must be at least 14.71 feet</em>

6 0

3 years ago

The equations for two lines in the coordinate plane are 2dx - y = -4 and 4x - y = -6, where d represents an unknown value. What

GaryK [48]

First, let's put both lines in Slope-intercept form (y = mx + b) to make it a bit easier:
Line A:
2dx - y = -4
-y = -4 - 2dx
y = 2dx + 4

Line B:
4x - y = -6
-y = -6 - 4x
y = 4x + 6

We want a value for d so that line A is perpendicular to line B, which has a slope of 4. That means that the slope of line A must equal -1/4.
2d = -1/4
d = -1/8

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3 years ago

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NNADVOKAT [17]

Answer:

Step-by-step explanation:

4 0

3 years ago

What is the surface area of the figure below

Vikki [24]

Answer:

54 ft

Step-by-step explanation:

So... the volume is length x width x height = volume.

So... 6 x 3 x 3 = 54 ft

Hope this helps =]

7 0

3 years ago