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erica [24]
3 years ago
14

Can someone help and explain

Mathematics
1 answer:
BaLLatris [955]3 years ago
5 0

Answer:

∠ A ≈ 43.1°

Step-by-step explanation:

Using the Sine rule in Δ ABC , that is

\frac{a}{sinA} = \frac{c}{sinC} , substitute values

\frac{20}{sinA} = \frac{29}{sin82} ( cross- multiply )

29 × sinA = 20 × sin82 ( divide both sides by 29 )

sinA = \frac{20sin82}{29} , thus

∠ A = sin^{-1} (\frac{20sin82}{29} ) ≈ 43.1° ( to 1 dec. place )

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Maurinko [17]

Answer:

Step-by-step explanation:

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0.99-repeats

6.25-terminates

7 0
3 years ago
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The GCF of 15 and 27 is _____.
jeka94

Answer:

The answer is 3

Step-by-step explanation:

List all prime factors

15:1,3,5,

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2 years ago
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Can you please answer my homework, its about sets.
Katyanochek1 [597]

The value of the set  (A∪C)'∩B is {9 , 12} .

A subfield of mathematical logic called set theory examines sets, which are essentially collections of objects.

  • Set theory is a discipline of mathematics that largely addresses problems that are pertinent to mathematics as a whole, despite the fact that any kind of object can be constructed into a set.
  • Set theory is founded on a simple binary relationship between an object o and a set A.
  • It is written as o A if o is a part (or member) of A. Members of a set are enumerated with commas to denote separation when describing them, or a property of those parts is enclosed in braces.
  • Sets can be associated by the membership relation since they are objects.

The given sets are:

U ={1,2,3,4,5,6,7,8,9,10,11,12,13}

A = {3,7,11,13}

B = {3,6,9,12,13}

C = {2,3,5,6,7,8}

Now B' = {1,2,4,5,7,8,10,11}

b) B'∩C = {2,5,7,8,}

c) A∪C = {2,3,5,6,7,8,11,13}

(A∪C)' = {1,4,9,10,12}

(A∪C)'∩B = {9 , 12}

Hence the value of the set (A∪C)'∩B is {9 , 12} .

To learn more about set visit:

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6 0
1 year ago
Solve the system using elimination 6x-3y=15 and 7x+4y=10
Oxana [17]
6x - 3y = 15.....multiply by 4
7x + 4y = 10....multiply by 3
---------------
24x - 12y = 60 (result of multiplying by 4)
21x + 12y = 30 (result of multiplying by 3)
---------------add
45x = 90
x = 90/45
x = 2

6x - 3y = 15
6(2) - 3y = 15
12 - 3y = 15
-3y = 15 - 12
-3y = 3
y = -3/3
y = -1

solution is (2,-1) <==
8 0
3 years ago
The perimeter of this triangle is 39 feet. Solve for x, and give the side lengths of the triangle.
frozen [14]

Answer:

x = 13 feet

Step-by-step explanation:

7 0
2 years ago
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