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Mandarinka [93]
3 years ago
15

Solve -3(5x-9) please

Mathematics
2 answers:
marissa [1.9K]3 years ago
5 0

Answer:

12

Step-by-step explanation:

Galina-37 [17]3 years ago
3 0

Answer:

−15x + 27

Step-by-step explanation:

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Please help<br> 45 = 32 - 47n
Scilla [17]

Answer:

45=32-47n

Step-by-step explanation:

4n7=45+35

47n=80

n=80:47

n=80/47

4 0
3 years ago
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The angle of depression from the top of a building to a point
AleksandrR [38]

The distance between point on the ground from the top of the building is 396 meter, if the building is 280 m high and The angle of depression from the top of a building to a point  on the ground is 45 degrees.

Step-by-step explanation:

The given is,

                 The angle of depression from the top of a building to a point  on the ground is 45 degrees.

                 Height of the building is 280 meter.

Step: 1

                 Given diagram is a right angled diagram,

                 For right angle triangle,

                              90° = 45° + 45°    

                                     = 90°  

                 Trignometric ratio,

                            sin ∅ = \frac{Opp}{Hyp}....................(1)

                For the above ratio take the bottom angle, that is angle of depression from the top of a building to a point  on the ground is 45 degrees.

                 Where, Opp side = 280 meters

                               Hyp side = x

                                           ∅ = 45°

                 Equation (1) becomes,

                                  sin 45° = \frac{280}{x}

                          0.70710678 =  \frac{280}{x}

                                            x =  \frac{280}{0.70710678}

                                            x = 395.979

               Distance between point on the ground from the top of the building,  x ≅ 396 meter                                                

                Trignometric ratio,

                                     cos ∅ = \frac{Adj}{Hyp}

                                   Cos 45 = \frac{Adj}{396}

                                         Adj = (0.70710678)(396)

              Bottom length, Adj = 280 meter

Result:

           The distance between point on the ground from the top of the building is 396 meter.

8 0
3 years ago
Help please! I have to do this math test and I dont understand ​
n200080 [17]

Answer:

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What's the answer to that question
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Can you please put the question?
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