Do you guys know how to get points

Mathematics

2 answers:

vitfil [10]3 years ago

8 0

Answer:

answer questions

Step-by-step explanation:

torisob [31]3 years ago

5 0

Answer:

Answer Questions I think

Step-by-step explanation:

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Question in image please help quickly, I'm on a time limit :D

inn [45]

Answer:

By distance formula ,

$AB = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$

$AB = \sqrt{(-1-5)^2 + (6-3)^2}$

$AB = \sqrt{36 + 9}$

$AB = \sqrt{45}$

$AB = 6.708$ (approx)

To give answer in 3 significant figures :

AB = 6.70

4 0

3 years ago

Mike wants to work out the height of a tree which has a fence around it. From A he sees that the angle of elevation of the top i

larisa [96]

Answer: 13.8 m

Step-by-step explanation:

Given

From point A, angle of elevation is $19^{\circ}$

From point B which is 18 m closer, it changes to $32^{\circ}$

Suppose the height of tree is h

From figure, we can write

$\Rightarrow \tan 32=\dfrac{h}{x}\\\\\Rightarrow h=x\tan 32^{\circ}$

Similarly

$\Rightarrow \tan19^{\circ}=\dfrac{h}{x+18}\\\\\Rightarrow h=(x+18)\tan 19^{\circ}\\\text{Substitute the value of h}\\\Rightarrow x\tan 32^{\circ}=x\tan 19^{\circ}+18\tan 19^{\circ}\\\Rightarrow x(\tan32^{\circ}-\tan 19^{\circ})=18\tan 19^{\circ}\\\\\Rightarrow x=\dfrac{18\tan 19^{\circ}}{\tan32^{\circ}-\tan 19^{\circ}}\\\\\Rightarrow x=22.09\approx 22.1\ m$