Answer:
sum of interior angles of the octagon is 1080 degree
Step-by-step explanation:
forluma:
(n-2)*180 degree
since octagon has 8 sides
(8-2)*180 degree
6*180
1080 degree
To solve, combine like terms:
6x+1=4x+5
2x+1=5
2x=4
x=2
x – slower car
3x faster car
D = distance traveled by slower car
D = distance traveled by faster car
D+d = 129
Both cars traveled for 2 hours
D=2x
d=2(3x) = 6x
2x+6x = 129
8x = 129
x=129/8 = 16.125 miles per hour
