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marta [7]
3 years ago
13

How many triangles can be constructed with angles measuring 25º, 25º, and 130º? A. one B.none C.more than one

Mathematics
2 answers:
uysha [10]3 years ago
5 0

Answer:

C. More than one

Step-by-step explanation:

We are given the angles of a triangle as 25°, 25° and 130°

In order for these angles to construct a triangle, the sum of the three angles must be 180°.

So, we get that,

25° + 25° + 130° = 50° + 130° = 180°

Since, the sum of the angles is 180° .

Therefore, many triangles can be drawn using the angles 25°, 25° and 130°.

Hence, option C is correct.

Dmitry_Shevchenko [17]3 years ago
3 0
The answer is A one triangle all those angles equal 180
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Write an<br> explicit formula for An, the nth term of the sequence 7, -42, 252, ....
erik [133]

Answer:

A_n = 7(-6)^{n-1}

Step-by-step explanation:

<u>Key skills needed: Explicit formula, Geometric sequence</u>

1) This is a geometric sequence, meaning a constant (like 6 or 3.5) is being multiplied to every term. First we need to find the constant.

This can be done by doing -42 ÷ 7   or   252 ÷ -42

-42 ÷ 7 equals -6.

252 ÷ -42 also equals -6.

2) This means that constant is -6.

3) The general form for an explicit formula of a geometric sequence is:

a_n = a_1(r)^{n-1}

--> r means the constant (or common ratio) that is being multiplied.

--> a_1 means the first term

--> a_n means the "nth" numbered term (so a_3 is the 3rd term, a_{10} is the 10th term and so on).

--> n-1 is just the "n" in a_n minus 1.

4) We can use this formula to create an explicit formula for the geometric sequence in the problem.

--> r = -6 (Since we got -6 as the constant/common ratio).

--> a_1  = 7 (Since 7 is the 1st term)

This means that our formula would be --> A_n = 7(-6)^{n-1}

<em>Hope you understood and have a nice day!! :D</em>

8 0
3 years ago
Use the following diagram and information to complete the proof.
Rashid [163]

Answer:

Given: ABCD is a rectangle.

Prove: The diagonals AC¯¯¯¯¯¯¯¯ and BD¯¯¯¯¯¯¯¯ are congruent.

Match each numbered statement to the correct reason to complete the proof.

PS : i will mark brainliest if they answer the question fully..

Step-by-step explanation:

Given: ABCD is a rectangle.

Prove: The diagonals AC¯¯¯¯¯¯¯¯ and BD¯¯¯¯¯¯¯¯ are congruent.

Match each numbered statement to the correct reason to complete the proof.

PS : i will mark brainliest if they answer the question fully..

6 0
2 years ago
What's 5-n? Is it some number less then five? Or five less than some number
mezya [45]
It's a number less than 5.
5 0
3 years ago
Brainlyyyyyyyyyyyyyy :)
Rashid [163]
Wow, that IS really BRAINLY! I’m so jealous
6 0
3 years ago
An astronomical unit (AU) is the average distance between Earth and the sun. One AU is equal to approximately 150,000,000 km. As
Dimas [21]

Using scientific notation, it is found that the measure of one astronomical unit in kilometers is 1.5 \times 10^8

A number in <em>scientific notation</em> is given by:

a \times 10^b

  • In which a \in [1, 10)
  • To realize the conversion from decimal to scientific notation, b is the number of decimal places the comma moves, being positive if to the left, negative if to the right.  

In this problem, 1 AU = 150,000,000 km.

  • The comma has to move 8 places to the right, hence b = 8

Then, the measure is: 1.5 \times 10^8

For more on scientific notation, you can check brainly.com/question/16394306

5 0
2 years ago
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