Velocity Against Current = 108 / 3 = 36 km/hour
Velocity With Current = 108 / 2 = 54 km/hour
"vsw" means velocity in still water "cs" means current speed
vsw -cs = 36
vsw +cs = 54 Adding both equations
2 * vsw = 90
velocity in still water = 45 km/hour
current speed = 9 km/hour
Source:
http://www.1728.org/veloccal.htm
Answer:
5
Step-by-step explanation:
Simplifying
8 + 4 = 2(x + 1)
Combine like terms: 8 + 4 = 12
12 = 2(x + 1)
Reorder the terms:
12 = 2(1 + x)
12 = (1 * 2 + x * 2)
12 = (2 + 2x)
Solving
12 = 2 + 2x
Solving for variable 'x'.
Move all terms containing x to the left, and all other terms to the right.
Add '-2x' to each side of the equation.
12 + -2x = 2 + 2x + -2x
Combine like terms: 2x + -2x = 0
12 + -2x = 2 + 0
12 + -2x = 2
Add '-12' to each side of the equation.
12 + -12 + -2x = 2 + -12
Combine like terms: 12 + -12 = 0
0 + -2x = 2 + -12
-2x = 2 + -12
Combine like terms: 2 + -12 = -10
-2x = -10
Divide each side by '-2'.
x = 5
Simplifying
x = 5
Answer:
7x^5 +6x^4 +2x^2-x+15
Step-by-step explanation:
Cmbine like terms-5x^1 and 4x are the same power so you combine resulting in -x