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WINSTONCH [101]
3 years ago
14

I need help please thank you

Mathematics
1 answer:
Lelu [443]3 years ago
3 0
I know y is a 90 degree angle. but i dont know what x is sorry.
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An automobile travels past the farmhouse at a speed of v = 45 km/h. How fast is the distance between the automobile and the farm
yulyashka [42]

Answer:

\frac{ds}{dt} = 39.586 km/h

Step-by-step explanation:

let distance between farmhouse and road is 2 km

From diagram given

p is the distance between road and past the intersection of highway

By using Pythagoras theorem

s^2 = 2^2 +p^2

differentiate wrt t

we get

\frac{d}{dt} s^2 = \frac{d}{dt} (4 + p^2)

2s \frac{ds}{dt}  =2p \frac{dp}{dt}

\frac{ds}{dt} = \frac{p}{s}\frac{dp}{dt}

\frac{ds}{dt} = \frac{p}{\sqrt{p^2 +4}} \frac{dp}{dt}

putting p = 3.7 km

\frac{ds}{dt} = \frac{3.7}{\sqrt{3.7^2 +4}} 45

\frac{ds}{dt} = 39.586 km/h

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3 years ago
3. The picture below shows a relationship between the number of circles and triangles.
dimaraw [331]

Answer:

D or A

Step-by-step explanation:

(D) One circle : four triangles  

  Example:

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(A) One circle : four triangles

    Example:

If there is two circles, the triangles will double like it shows [evidences]

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3 years ago
I WILL GIVE BRAINIEST TO THE BEST ANSWER
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Domain is the values of x. x is from -5 to 7, it includes -5 ([ ] is the include symbol, but doesn't include 7, so C is the answer
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54

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