What is the value of a3 in the sequence? -4, -2, - 1/2, -1/4

-4
-3

-1/2

-1/4

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)