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zavuch27 [327]
3 years ago
12

What is special about a 30 60 90 triangle?

Mathematics
2 answers:
Nata [24]3 years ago
7 0
A 30-60-90 triangle is special because of the relationship of its sides. Also <span>It turns out that in a 30-60-90 triangle, you can find the measure of any of the three sides, simply by knowing the measure of at least one side in the triangle.

Hope this helps. :)</span>
crimeas [40]3 years ago
3 0
30= X. 5
90= 2x. 2(5)=10
60=x√3. 5√3

For example if the 30 ° is 5 then the 90 is 2(5)=10 the 60 is 5 √3
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The following two-way table describes student's after school activites. Find the probability that a randomly selected student is
stiv31 [10]

The probability that a randomly selected student is in music/drama is 25%

<h3>How to determine the probability?</h3>

From the table, we have the following values

Music/Drama = 7 + 13 + 5 = 25

Total = (20 + 20 + 25 + 7 + 13 + 5 + 3 + 2 + 5) = 100

The probability is then calculated as:
P = Music/Drama / Total

So, we have:

P = 25/100

Express as percentage

P = 25%

Hence, the probability that a randomly selected student is in music/drama is 25%

Read more about probability at:

brainly.com/question/251701

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4 0
2 years ago
Complete The Square:<br> (Z^2)-19z=66
Musya8 [376]
To solve the equation using complete square method we proceed:
z^2-19z=66
but
 c=(-b/2a)^2
c=(-19/2)^2
c=361/4
thus:
z^2-19z+361/4=66+361/4
factoring the LHS we get:
1/4(2z-19)^2=625/4

(2z-19)^2=625
getting the square root of both sides we get:
2z-19=+/-25
2z=+/-25+19
2z=44 or -6
z=22 or -3
Answer: z=22 or z=-3



8 0
3 years ago
Which numbers are composite numbers? Select all that are true
GuDViN [60]

Answer:

49

35

32

Hope this helped!

3 0
3 years ago
Read 2 more answers
What is the percent decrease from 60 to 39?
IrinaK [193]
X - the percent decrease

60-60x=39 \ \ \ |-60 \\&#10;-60x=-21 \ \ \ |\div (-60) \\&#10;x=\frac{-21}{-60} \\ \Downarrow \\ x=\frac{-21}{-60}=\frac{-21 \div (-3)}{-60 \div (-3)}=\frac{7}{20}=\frac{7 \times 5}{20 \times 5}=\frac{35}{100}=35\%

It's a 35% decrease.
7 0
3 years ago
Read 2 more answers
What the hell WHERES THE NUMBERS TO THE VARIABLE
Svetradugi [14.3K]

Answer:

t=\frac{d}{r}

There are no numbers because it is changing the subject of the equation.

Step-by-step explanation:

d=rt

\frac{d}{r} =t

3 0
3 years ago
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