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ololo11 [35]
3 years ago
14

Simplify X+^2+8x+7/X^2-1​

Mathematics
1 answer:
denis23 [38]3 years ago
3 0

Answer:try 43

Step-by-step explanation:

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4. Suppose a security light is set into the ground and aims its light at the top of the building. The angle of elevation of the
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Answer:

a) The distance of the light's base from the bottom of the building is approximately: 5.2 ft

b) The length of the beam is approximately: 10.4 ft

Step-by-step explanation:

First, we have to recognize that we may draw a right triangle to picture our problem. Then, in order to find out the distance of the light's base from the bottom of the building, we need to use the tangent trigonometric function:

tan(angle) = opposite side / adjacent side

We know the angle and the opposite side and we want to find the adjacent side:

adjacent side = opposite side / tan(angle) = 9 ft / tan(60°) = 9 ft / = 9 ft / 1.73 = 5.2 ft

In order to find the length of the light  beam, we use Pythagoras Theorem:

leg1²+leg2² = hyp²

Since the length of the beam corresponds to the hypotenuse and since we already know the length of the two legs, it is just a matter of substituting the values:

hyp = square_root(leg1²+leg2²) = square_root(9² + 5.2²) ft = square_root(108.4) ft = 10.4 ft

7 0
3 years ago
If (-2,3), 3x-2ky+4=0 find the value of k
ipn [44]
Answer: k = -1/3

Step-by-Step Explanation:

=> 3x - 2ky + 4 = 0
Value of ‘x’ = -2
Value of ‘y’ = 3

Substitute values of ‘x’ and ‘y’ :-
=> 3x - 2ky + 4 = 0
= 3(-2) - 2k(3) + 4 = 0
= -6 - 6k + 4 = 0
= -6k = 6 - 4
= -6k = 2
= k = 2/-6
=> k = -2/6 = -1/3

Therefore, k = -1/3
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2 years ago
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3 years ago
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What is the value of this expression?<br> 1/6 ÷ 12
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Answer:

0.01388888888

Step-by-step explanation:

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3 years ago
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Margo missed 24.6% of the free throw shots in a season. During the season she took a total of 90 free throw shots. Which of the
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90 shots times 24.6% = 22.14

He missed roughly 22 shots
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3 years ago
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