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3 years ago

Somebody help me wit dis

Mathematics

2 answers:

Nezavi [6.7K]3 years ago

8 0

Answer:

Step-by-step explanation:

with what

Brrunno [24]3 years ago

8 0

Wait... which question do ya need help with?

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A communications tower is supported by two wires, connected at the same point on the ground. One is attached to the tower at D a

viktelen [127]

Answer:

10.99 m

Step-by-step explanation:

✍️What we are basically asked to solve here is to find the distance between C and D.

To find CD, find the length of BC, and BD. Their difference will give us CD.

Thus, BC - BD = CD.

✍️Finding BC using trigonometric ratio formula:

$\theta = 30 + 10 = 40$

Opposite side = BC = ??

Adjacent side = 42 m

Thus:

$tan(\theta) = \frac{opposite}{adjacent}$

Plug in the values

$tan(40) = \frac{BC}{42}$

Multiply both sides by 42

$tan(40) \times 42 = \frac{BC}{42} \times 42$

$35.24 = BC$

BC = 35.24 m

✍️Finding BD using trigonometric ratio formula:

$\theta = 30$

Opposite side = BD = ??

Adjacent side = 42 m

Thus:

$tan(\theta) = \frac{opposite}{adjacent}$

Plug in the values

$tan(30) = \frac{BD}{42}$

Multiply both sides by 42

$tan(30) \times 42 = \frac{BD}{42} \times 42$

$24.25 = BD$

BD = 24.25 m

✍️How much below the top of the tower is the shorter one attached:

Thus,

BC - BD = CD

35.24 m - 24.25 m = 10.99 m

7 0

2 years ago

Which of the following points is between 2 and -3 on the number line?<br> -4 3 -2 -5

lions [1.4K]

Answer:

-2

Step-by-step explanation:

-5 -4 -3 <u>-2</u> -1 0 1 2 3 4 5

3 0

3 years ago

Solve the system by substitution 10x-2y=-16 and y=3x

lesantik [10]

The answer would be x=-4.

5 0

2 years ago

A cylinder has a radius of 9 inches and a height of 5 inches. What is the volume and surface area of the cylinder?

Licemer1 [7]

The answer is:
v ≈ 1272.35 in^3

Sorry if this does not help.

4 0

2 years ago

Read 2 more answers

An airplane started at point K, travelled 560 miles to point L, adjusted its route and travelled another 575 miles to point M. I

S_A_V [24]

Answer:

Step-by-step explanation:

Using the cosine theorem:

$c^{2} =a^{2} +b^{2} -abcos\beta$

$952^{2} =560^{2} +575^{2} -560*575cos\beta$

$\beta =cos^{-1} (\frac{560^{2}+575^{2}-952^{2} }{2*560*575} )$

The angle is 114.014 degrees if we substract 90 degrees it means that at point L the plane changed its angle by 24 degrees

4 0

2 years ago