Answer:
f(x)^-1 = 
Step-by-step explanation:
f(x) = (4x - 3) / 7
y = (4x - 3) / 7
x = (4y - 3) / 7
x / 7 = 4y - 3
x/7 + 3 = 4y
y =
You can evaluate all numbers and in the prosses, make any problem easier.
Area is all the space that is taken up by a two dimensional object. (the inside)
Perimeter is the distance around a two dimensional object. (the outside)
Solving for both velocities:
16 km / 2 hours = 8 km per hour downstream
16 km / 4 hours = 4 km per hour upsteram
bsw means boat speed in still water cs means current speed
bsw - cs = 4 km per hour
bsw + cs = 8 km per hour
Adding both equaions:
2 bsw = 12 km per hour
boat speed = 6 km per hour
bsw + cs = 8 then
current speed = 2 km per hour
Source: 1728.com/veloccal.htm
19.33 is the right answer
