he will change his oil 16 times because 160,000 divided by 10,000 equals 16
15 bags you will only use 14 full bags and use some of the 15th bag
0.44 / (0.06 + 0.09) = 0.44 / 0.15 = 2.93....about 3 hrs
(2, 3) and (2, 2)
(-5, 2) and (-5, 1)
(6, 5) and (6, -5)
(-1, 0) and (-1, 6)
A function cannot reuse a value of x.
Each value of x can only appear once in a function.
