3 years ago

X^2+10x+5=30 quadratic equation

1 answer:

4 0

First subtract 30 from both sides so it is equal to 0

the quadratic formula is -b plus or minus sqrt of (b^2 - 4ac) all over 2a so
-10 plus or minus sqrt (100-25) all over 2
this is equivalent to

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Answer:

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Step-by-step explanation:

Given : The deck is at a height of 520 ft. She sees her friend on the ground below at an angle of depression of 85.6 degrees.

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Solution :

Refer the attached figure

Height of deck =AB =520 ft.

Angle of depression ∠C = 85.6°

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We will use trigonometric ratios :

$tan \theta = \frac{perpendicular}{base}$

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