3 years ago

What is the solution to the following equation x^2 +3x+ 7=0

Mathematics

2 answers:

sineoko [7]3 years ago

8 0

Answer:

x= -1.4 i think

Step-by-step explanation:

Oxana [17]3 years ago

3 0

Answer:

x = _-3+sqrt(19i)_______

x = __-sqrt(19i-3)_______

Step-by-step explanation:

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From a radar station, the angle of elevation of an approaching airplane is 32.5 degree. The horizontal distance between the plan

denis23 [38]

Answer: 42.21 km

Step-by-step explanation:

We can solve this using trigonometry, since we have the following data:

$\theta=32.5\°$ is the the angle of elevation

$d=35.6 km$ is the horizontal distance between the plane and the radar station

$x$ is the hypotenuse of the right triangle formed between the radar station and the airplane

Now, the trigonometric function that will be used is <u>cosine</u>:

$cos\theta=\frac{d}{x}$ because $d$ is the adjacent side of the right triangle

$cos(32.5\°)=\frac{35.6 km}{x}$

Finding $x$ :

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