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Alchen [17]
3 years ago
9

In triangle A B C, angle C is a right angle and BC = 11. If lower m angle B equals 30 degrees, find AC.

Mathematics
2 answers:
Liono4ka [1.6K]3 years ago
7 0

Answer:

AC=11\frac{\sqrt{3}}{3}\ units  or  AC=6.35\ units

Step-by-step explanation:

we know that

In the right triangle ABC

AC and BC are the legs of the triangle

AB is the hypotenuse

see the attached figure to better understand the problem

tan(30\°)=\frac{AC}{BC}

tan(30\°)=\frac{\sqrt{3}}{3}

so

\frac{\sqrt{3}}{3}=\frac{AC}{BC}

AC=\frac{\sqrt{3}}{3}BC

substitute the value of BC

AC=\frac{\sqrt{3}}{3}(11)

AC=11\frac{\sqrt{3}}{3}\ units

AC=6.35\ units

SVEN [57.7K]3 years ago
5 0

Answer:

11sqrt3/3

Step-by-step explanation:

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it took 32 minutes for 3 people to paint 4 walls. how many minutes does it take for 4 people to paint 7 walls
ludmilkaskok [199]
Hello.

Time taken by 3 person to paint one wall=32÷4=8minstime taken by 1 person to paint one wall=8*3=24minstime taken by 1 person to paint 7 walls=24*7=168 minstime taken by 4 persons to paint 7 walls=168÷4=42mins
Answer= 42 minutes

Have a nice day

6 0
3 years ago
The data represents the results for a test for a certain disease. Assume one individual from the group is randomly selected. Fin
Zepler [3.9K]

Answer: 8/145

Step-by-step explanation: Rewriting the table

Positive and Negative stand for the result of the test

Yes and No stand for having the disease

          Positive       |      Negative     | Total

<u>Yes </u><u>  |     137           |             8           |   145</u>

<u>No  </u><u>  |       16           |            139        |    155</u>

<u>Total</u><u> |     153           |            147        |   300</u>

<u />

probability of getting someone who tests negative, given that he or she had the disease.

P(Negative | Yes) = <u>P(Negative ∩ Yes)</u> = <u> 8 </u>

                                        P(Yes)              145        

<u />

5 0
3 years ago
Please help me i will give brainliest to the right answer
horsena [70]

Answer:

4(5y-2)

-2(3y+(-7))

-2(9y-(-8))

3 0
3 years ago
How do you mark brainliest for an answer ​
babymother [125]

Answer:

so you wait for someone  to answer then when someone answers there a crown on there answer cube then you click that to add brainlest!

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
help me with measurement please! if a square can become a rectangle can a rectangle become a square?
yawa3891 [41]
<span>Actually, every square is a rectangle, since the angles in a square are always right angles. That's more than saying that a square can be a rectangle; it is one.
</span><span>
And since squares are rectangles, you know that some rectangles are squares--namely, the squares are!
</span>
<span>We teach children "this is a rectangle, that is a square. The rectangle's sides are different lengths". But when you grow up, it's important to think of the square as a SPECIAL rectangle, because it is all that a rectangle is, and more.
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A square is still a rectangle, but it's not just a rectangle, it's a (pedigreed) square.
In summary, yes a rectangle can be a square.

Hope this helped :)
8 0
3 years ago
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