Answer:
4
Step-by-step explanation:
Ok, so first, you need to get the denominators to be equal so you'd multiply x/5 by 4 to get 4x/20 and -1/4 by 5 to get -5/20
4x/20 - 5/20 = 11/20
add 5/20 to get 16/20
4x/20 = 16/20
multiply both sides by 20 to cancel out fractions
4x = 16
divide by 4
x=4
Each interior angle=140°
(n-2)180°/n=140°
180°n-360°/n=140°
180°n-360°=140°n
180°-140°=360°
40°n=360°
n=360°/40°
n=9
Hence, the number of sides of the polygon is 9.
It is nonagon .
there is a 12.5% increase
15x125=1875 shirts
