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asambeis [7]
3 years ago
12

What is the sum each interior angle of a regular octagon

Mathematics
1 answer:
swat323 years ago
3 0
Use the following formula, with n = the number of sides.
\frac{(n - 2) \times 180}{n}
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Which number(s) below belong to the solution set of the inequality? Check all that apply.
ValentinkaMS [17]
X=28
4x=112
/4     /4
x = 28
8 0
3 years ago
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Solve the equation by factoring 0=x2+8x+16
stepan [7]

Answer:

Alright all you nee to do is move all terms

which gives you a Answer of x = - 4 Hope this helps :)

Step-by-step explanation:

If u want i can explained with more detail

6 0
4 years ago
Read 2 more answers
Can someone please help me
stepladder [879]

5)

x = 132 - 42

x = 90

Answer

90 degrees, right angle


6)

180 - 126 = 54

The other two are congruent so 54/2 = 27

Answer

27

7)

An exterior angle of a triangle is equal to the sum of the opposite interior angles

So

6x = 38 + 82

6x = 120

 x = 20

Answer

20

8)

Sum of interior in a triangle = 180 degrees

So

2x - 3 + 23 + 128 = 180

2x + 148 = 180

2x = 32

 x = 16

Answer

16

4 0
3 years ago
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
Can someone check these for me? lmk if they are wrong and how to correct them please
Cloud [144]

Answer:

the 1. is y = (5/4)x + 6 and 2 . is y = 20x+10, so you are right, both of them correct

8 0
3 years ago
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