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icang [17]
3 years ago
7

I just need question 2, please help

Mathematics
2 answers:
Musya8 [376]3 years ago
6 0
There will be 13 sides in total, this answer was already on Brainly don’t waste ur points!
hoa [83]3 years ago
4 0
Answer: 13 sides



Explanation:

Sum of interior angles S=(n−2)×180∘, where n is the number of sides of the polygon. Given S=1980∘

⇒1980=(n−2)×180
⇒n−2=1980/180=11
⇒n=11+2=13
Hence, the polygon has 13 sides.
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Show that if u+v and u-v are orthognal, then the vectors u and v must have the same length.
pashok25 [27]

Answer with Step-by-step explanation:

We are given that

u+ v and u-v are orthogonal

We have to prove that u and v must have the same length.

When two vector a and b are orthogonal then

a\cdot b=0

By using the property

(u+v)\cdot (u-v)=0

We know that

(a+b)\cdot (a-b)=\mid a\mid^2-\mid b\mid^2

\mid u\mid ^2-\mid v\mid^2=0

\mid u\mid^2=\mid v\mid^2

Magnitude is always positive

When power of base on both sides are equal then base will be equal

Therefore,

\mid u\mid=\mid v\mid

Hence, the length of vectors u and v must have the same length.

5 0
4 years ago
Bob need to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. bob has 6 cups of concentrate. h
USPshnik [31]
3 x 2 = 6 cups of concentrate

3.5 x 3 = 10.5 cups of water  



Bob can make 6 cups of orange juice.
8 0
3 years ago
Read 2 more answers
What is the length of the diameter of a circle inscribed in a right triangle with the length of hypotenuse c and the sum of the
jeyben [28]

Answer:

  diameter = m - c

Step-by-step explanation:

In ΔABC, let ∠C be the right angle. The length of the tangents from point C to the inscribed circle are "r", the radius. Then the lengths of tangents from point A are (b-r), and those from point B have length (a-r).

The sum of the lengths of the tangents from points A and B on side "c" is ...

  (b-r) +(a-r) = c

  (a+b) -2r = c

Now, the problem statement defines the sum of side lengths as ...

  a+b = m

and, of course, the diameter (d) is 2r, so we can rewrite the above equation as ...

  m -d = c

  m - c = d . . . . add d-c

The diameter of the inscribed circle is the difference between the sum of leg lengths and the hypotenuse.

5 0
3 years ago
Multiplying fractions:<br><br> 5     1 <br> — x — = <br> 6     2
seropon [69]

5/12 is your answer to 5/6 times 1/2

3 0
3 years ago
I'm not sure how to solve please help
wel
Follow these step:
So you want to start with adding the 5 to the other side of the equation so it would become 8=g/4
Then you want to multiply each side by 4 so it becomes 32=g

The answer is g=34
I hope this helps :)
8 0
3 years ago
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