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Tanya [424]
4 years ago
5

How solve angles in polygons?

Mathematics
1 answer:
Flauer [41]4 years ago
5 0
The equation to solve this is (n-2) x 180. N is equal to the number of sides minus 2 times 180 
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What is the value of x?<br> x + 5 = - 6x - 16
exis [7]
X +5 = -6x - 16
add 16 to both sides
x+21 = -6x
add 6x to both sides
7x+21=0
factor out the seven
7(x+3)=0

if 7 times (x+3) = 0 then (x+3) must equal zero because 7 times 0 is 0

so x+3=0
subtract three from both sides
x= -3
4 0
3 years ago
Read 2 more answers
James wants to go to a concert with his friends. The tickets to the show cost $10 each. If James buys x tickets at a cost of c d
Sladkaya [172]

Answer:

10x =  c

Step-by-step explanation:

10 time the number for friend equals the cost

5 0
3 years ago
If x – 10 is a factor of x2 – 8x – 20, what is the other factor?
Svetach [21]

Answer:

The other factor is (x+2)

Step-by-step explanation:

we know that

(x-a)(x-b)=x^{2}-xb-xa+ab

(x-a)(x-b)=x^{2}-(a+b)x+ab

In this problem we have

x^{2} -8x-20

and

a=10 -----> because is a factor

substitute and solve for b

x^{2} -8x-20=x^{2}-(10+b)x+10b

so

8=10+b\\b=-2

Verify in the second equation

-20=10b -----> -20=10(-2) -----> -20=-20--> is ok

The other factor is (x+2)

3 0
3 years ago
Read 2 more answers
This histogram shows the numbers of shoppers in various age groups at a clothing store. How many shoppers are less than 30 years
Harlamova29_29 [7]
A.6 because its close to 30 
3 0
3 years ago
Read 2 more answers
Someone please help me with this question I need it ASAP
ZanzabumX [31]

Your question has been heard loud and clear.

First one (x+2i)(x-2i) = x^2+4

Second one (x-2+2i)(x-2-2i) = x^2-4x+8

Third one (x+1+i)(x+1-i) = x^2+2x+2

Thank you

Edit: Sorry for taking 15 minutes I was calculating lol

6 0
4 years ago
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