Answer:
x = -1/3
Step-by-step explanation:
4(3x-1)+8=2(3x+5)-8
Distribute
12x -4 +8 = 6x +10 -8
Combine like terms
12x +4 = 6x +2
Subtract 6x from each side
12x-6x +4 = 6x-6x +2
6x+4 =2
Subtract 4 from each side
6x+4-4=2-4
6x =-2
Divide each side by 6
6x/6 = -2/6
x = -1/3
Answer:
Ext=2x
Int=7x
Int+ext=180
2x+7x=180
9x=180
x=20
Ext=2×20=40
No of sides =360/40
=9 sides.
I hope this helped you
Step-by-step explanation:
Since it’s in percents, put the percent over 100 as a fraction and simplify them. For percents that aren’t given, add the rest and subtract it from 100 and then place it as a fraction over 100
The interior angle of a regular polygon is equal to 180(n - 2)/n. The exterior angle is always equal to 360/n. Using the given relationship from the item above, the equation that can be formed is,
180(n - 2)/ n = 3(360/n)
The value of n from the equation is 8. The polygon with 8 sides is an octagon.
<em>Answer: OCTAGON</em>
Do a proportion
78/100= x/95
Cross multiply and divide
78 x 95= 7,410
7,410 divided by 100 is 74.1
Answer is 74.1
