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adoni [48]
3 years ago
9

How long is DE? Any help will be appreciated thank you

Mathematics
1 answer:
lilavasa [31]3 years ago
3 0

Answer: 4

Step-by-step explanation:

<u>solve for the missing angle</u>

the total degrees a triangle can have is 180 so

180-90-60=30

use <u>law of sines</u> to solve for x

\frac{x}{sin30} =\frac{4\sqrt{3} }{sin60}

cross multiply

sin60*x=4\sqrt{3} sin30

divide by sin60

x=\frac{4\sqrt{3}sin30 }{sin60}

type into calculator with (<em>ALPHA Y= </em>for a fraction on TI-84) MAKE SURE IT IS IN DEGREES

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The quadrilateral shown is rotated 90° clockwise about the origin. In which quadrant is the image of the quadrilateral located?
Viktor [21]

Answer:

Option (2). 1

Step-by-step explanation:

Coordinates of point A, B, C and D are,

A(-4, 4), B(-2, 4), C(-2, 1) and D(-4, 3).

Quadrilateral ABCD when rotated 90° clockwise about the origin,

Rule for the rotation of the vertices,

(x, y) → (y, -x)

Following the rule of rotation coordinates of the image points,

A(-4, 4) → A'(4, 4)

B(-2, 4) → B'(4, 2)

C(-2, 1) → C'(1, 2)

D(-4, 3) → D'(3, 4)

Since all image points have the positive coordinates (x and y coordinates), image quadrilateral A'B'C'D' will be located in 1st quadrant.

Option (2) is the correct option.

4 0
3 years ago
The price of Stock A at 9 A.M. was ​$14.83. Since​ then, the price has been increasing at the rate of ​$0.12 each hour. At noon
BARSIC [14]

Answer:

  • 0.5 hours

Step-by-step explanation:

Let the x be the number of hours after noon.

<u>We have the following equation:</u>

  • 14.83 + 0.12(x + 3) = 15.33 - 0.15x
  • 14.83 + 0.12x + 0.36 = 15.33 - 0.15x
  • 0.12x + 0.15x = 15.33 - 15.19
  • 0.27x = 0.14
  • x = 0.14/0.27
  • x ≈ 0.5

5 0
3 years ago
In building a tent, Jada ties a rope from the top of a pole 3 meters high to a stake that is 4 meters away from the base of the
Leokris [45]

Answer:

The answer is most definitely B

3 0
2 years ago
I need help answer ASAP I’m confused
katrin [286]

Answer:

Step-by-step explanation:

You can plug in the 294 for A and solve

4 0
4 years ago
Fatore a equação<br><br> 2x²-3xy-2y²-2x-11y-12
Keith_Richards [23]

2x²-3xy-2y²-2x-11y-12

Write -3xy as a difference

2x²+xy-4xy-2y²-2x-11y-12

write -2x as a difference

2x²+xy-4xy-2y²+4x-6x-11y-12

Write -11y as a difference

2x²+xy-4xy-2y²+4x-6x-8y-3y-12

Factor out 2x from the expression

2x×(x-2y-3)+xy-2y²+4x-8y-3y-12

Factor out y from the expression

2x×(x-2y-3)+y×(x-2y-3)+4x-8y-12

Factor out 4 from the expression

2x×(x-2y-3)+y×(x-2y-3)+4(x-2y-3)

Factor out x-2y-3 from the expression

Answer: (x-2y-3)x(2x+y+4)

PLEASE MARK ME AS BRAINLIEST!!

3 0
3 years ago
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