100 miles ............... 2 hours
x miles ................1 hour
x = 100 m / 2 h = 50 m / h
A=30,000(1+.07/1)^8*1
Final amount = Principal(1+rate/times compounded in a year)^years to grow*times compounded in a year
Answer = 51,545.59
I'll sub my guy. Don't give up, keep climbing.
Y - 2x = 8 . . . . (1)
16 + 4x = 2y . . (2)
From (1), y = 2x + 8 . . . (3)
Putting (3) into (2) gives
16 + 4x = 2(2x + 8) = 4x + 16
0 = 0
Therefore, there are infinite number of solutions.