40 percebt of 40 is 40 of 100
40/100 = 0.04 of means multiply so if 40 is 40/100*40 =16 is the 40 percent of 40.
F(x)=5x+10
5x=-10
x=-10/5
x=-2
Result is f(-2).
60 onces is 15lbs so then i beleve you have 11lbs too much
D 2520 -------------------------------------------