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soldi70 [24.7K]
4 years ago
14

A. x = 40 c. x = 20 b. x = 10 d. x = 15

Mathematics
2 answers:
velikii [3]4 years ago
6 0

Answer:

B

Step-by-step explanation:

Multiply x/20 each side

Marianna [84]4 years ago
6 0

Answer:

b

Step-by-step explanation:

20/x=2

*x        *x

20=2x

:2     :2

10=x

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A radio tower is located 300 feet from a building. From a window in the building, a person determines that the angle of elevatio
DerKrebs [107]

Answer:

The tower is approximately 381 feet high.

Step-by-step explanation:

Refer to the sketch attached. The height of the tower can be found in two parts:

  • The part above the window, and
  • The part under the window.

Each part can be seen as a leg of a right triangle. The other leg is the distance between the building and the tower and is 300-feet long. The angle opposite to the leg is given.

  • The length of the upper part is 300\cdot \sin{42^{\circ}} feet.
  • The length of the lower part is 300\cdot \sin{37^{\circ}}.

The height of the tower is the sum of the two parts:

300\cdot \sin{42^{\circ}} + 300\cdot \sin{37^{\circ}} = 300(\sin{42^{\circ}}+\sin{37^{\circ}}) = 381 feet.

4 0
4 years ago
Olympic gold medal winner Michael Phelps compete in a pool with required dimensions 2.5 M by 50 m by 2 m what is the volume of t
Murrr4er [49]

Answer:

250 cubic m

Step-by-step explanation:

volume of the Olympic grid pool

= 2.5 \times 50 \times 2 \\  = 2.5 \times 100 \\  = 250 \:  {m}^{3}

5 0
3 years ago
Find the common ratio of the sequence. 3,9,27,81
lisov135 [29]
It might be 3/4, 6/5, 9/6, 12/7, 15/8
8 0
3 years ago
Read 2 more answers
In the number 5,789 which digit is in the hundreds place?
bogdanovich [222]

Answer:

7

Step-by-step explanation:

6 0
4 years ago
Read 2 more answers
X/3=x+2/5 soo...x=___
Stolb23 [73]
X/3 = x + 2/5....multiply everything by common denominator of 15
5x = 15x + 6
5x - 15x = 6
-10x = 6
x = -6/10 reduces to - 3/5

or...
x/3 is the same as 1/3x

1/3x = x + 2/5
1/3x - x = 2/5
1/3x - 3/3x = 2/5
-2/3x = 2/5
x = 2/5 * -3/2
x = - 6/10 which reduces to - 3/5
7 0
3 years ago
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