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Anna007 [38]
3 years ago
8

Please help and thank you if you do

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
8 0

Answer:116

Step-by-step explanation:

I think Is the answer

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Simplify the numerical expression 5.75 - 1/2 (20÷2.5) ÷ 2+6
svet-max [94.6K]

Answer:

5.75 - 1/2 times 8 divided by 2 + 6

Step-by-step explanation:

3 0
3 years ago
A point H is 20m away from the foot of a tower on the same horizontal ground. From the point H, the angle of elevation of the po
astra-53 [7]

Answer:

a. See Attachment 1

b. PT = 12.3\ m

c. HT = 31.1\ m

d. OH = 28.4\ m

Step-by-step explanation:

Calculating PT

To calculate PT, we need to get distance OT and OP

Calculating OT;

We have to consider angle 50, distance OH and distance OT

The relationship between these parameters is;

tan50 = \frac{OT}{20}

Multiply both sides by 20

20 * tan50 = \frac{OT}{20} * 20

20 * tan50 = OT

20 * 1.1918 = OT

23.836  = OT

OT = 23.836

Calculating OP;

We have to consider angle 30, distance OH and distance OP

The relationship between these parameters is;

tan30 = \frac{OP}{20}

Multiply both sides by 20

20 * tan30 = \frac{OP}{20} * 20

20 * tan30 = OP

20 * 0.5774= OP

11.548 = OP

OP = 11.548

PT = OT - OP

PT = 23.836 - 11.548

PT = 12.288

PT = 12.3\ m (Approximated)

--------------------------------------------------------

Calculating the distance between H and the top of the tower

This is represented by HT

HT can be calculated using Pythagoras theorem

HT^2 = OT^2 + OH^2

Substitute 20 for OH and OT = 23.836

HT^2 = 20^2 + 23.836^2

HT^2 = 400 + 568.154896

HT^2 = 968.154896

Take Square Root of both sides

HT = \sqrt{968.154896}

HT = 31.1\ m <em>(Approximated)</em>

--------------------------------------------------------

Calculating the position of H

This is represented by OH

See Attachment 2

We have to consider angle 50, distance OH and distance OT

The relationship between these parameters is;

tan50 = \frac{OH}{OT}

Multiply both sides by OT

OT * tan50 = \frac{OH}{OT} * OT

OT * tan50 = {OH

OT * 1.1918 = OH

Substitute OT = 23.836

23.836 * 1.1918 = OH

28.4= OH

OH = 28.4\ m<em> (Approximated)</em>

5 0
3 years ago
Help me with this pls
Scrat [10]

Answer:

Step-by-step explanation:

5 0
3 years ago
X divided by 2 if x equals 3
Genrish500 [490]

Answer:

the answer is 1.5

Step-by-step explanation:

x divided by 2 if x equals 3

3÷2=1.5

4 0
2 years ago
Read 2 more answers
Solve. Reduce answers to lowest terms. Simplify improper fractions as mixed numbers.
serious [3.7K]
5 5/6 becomes the mixed number 35/6, and 2 2/3 becomes the mixed number 8/3, which can be rewrittten as 16/6.
                                              3*17
Then:  35/6 + 16/6 = 51/6 = ---------- =  17/2 (answer)
                                              3 * 2 
3 0
3 years ago
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