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gayaneshka [121]
3 years ago
7

What is the length of the altitude of the equilateral triangle below?30°613613a60" 90" 60"313 313O A. 3O B. 9O D. 3N3o E. 108o F

. 81

Mathematics
2 answers:
bearhunter [10]3 years ago
6 0

Answer:

B)9

Step-by-step explanation:

APEX ANSWER

vodka [1.7K]3 years ago
5 0
The answer is B. 9
Use cosine rule. In this case, I am using SOH and the right triangle:
sin 60°= a ÷ 6 root 3
(6 root 3)(sin 60°)= a
a=9
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stiv31 [10]

Answer:

When we have a quadratic equation:

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In our case, we have

5*x^2 - 10*x + c = 0

Then the determinant is:

D = (-10)^2 - 4*5*c = 100 - 4*5*c

And we want this to be smaller than zero, then let's find the value of c such that the determinant is exactly zero:

D = 0 = 100 - 4*5*c

    4*5*c = 100  

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            c = 100/20 = 5

As c is multiplicating the negative term in the equation, if c increases, then we will have that D < 0.

This means that c must be larger than 5 if we want to have complex solutions,

c > 5.

I can not represent this in your number line, but this would be represented with a white dot in the five, that extends infinitely to the right, something like the image below:

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2 years ago
How are the two angles below related? Drawing not to scale.<br><br><br> Drawing is not to scale.
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we know that

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5 0
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Step-by-step explanation:

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So Pedro bought 6 \frac{3}{4} lbs of sand overall. Now, we just need to multiply the cost per pound by the total amount of sand he bought.

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