5x + 13 and 10x - 7 represent the lengths in inches of 2 sides of an equilateral octagon. What is the length of one side

soo this can be solve by using the formula:

f = p( 1 + i)^ n

where f is the future profit

p is the initial profit

i is the percent increase

n is the number of years

a . f = 30000 ( 1.05)^n

b. f = 30000 ( 1.05)^15

f = $62,368

"exterior angles = 360 / number of sides.

60 = 360 / sides

sides = 360 / 60

sides = 6"