4P2 * 2P1 * 3P2
you want to use permuations instead of combinations because order matters.
12*2*6=144
12.41 less than the product of 42 and x
= 42x - 12.41
The depreciated value in year 4 is 14,000. In year 5, it is 8,400. The depreciation expense in year 5 is
.. $14,000 -8,400 = $5,600
Y=-5x+9
3x+2(-5x+9)=4
3x-10x+18=4
-7x=4-18
-7x=-14
x=2
5(2)+y=9
10+y=9
y=9-10
y=-1
The answer is (2,-1) :)