--Almonds worth $4.05 per pound were mixed with walnuts worth $4.15 per pound. How many pounds of each were used if there were 16 more pounds of almonds than there were pounds of walnuts and the value of the mixture was $100.88? (Hint: Use x to represent the pounds of walnuts.)
Let x be the number of pounds of walnuts.
The number of pounds of almonds is x + 16.
The total weight of both nuts is x + (x + 16) = 2x + 16.
The total cost of the mixture is (4.05 * (x + 16)) + (4.15 * x) = 100.88.
Expanding the equation, we get 4.05x + 64.8 + 4.15x = 100.88.
Combining like terms, we get 8.2x + 64.8 = 100.88.
Subtracting 64.8 from both sides, we get 8.2x = 36.08.
Dividing both sides by 8.2, we get x = 4.4.
Substituting this value back into 2x + 16, we get 2*4.4 + 16 = 28.8 pounds of almonds.
Thus, there are 4.4 pounds of walnuts and 28.8 pounds of almonds. Answer: \boxed{4.4}.