What is this one?

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs

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

Question 6(multiple choice worth 5 points) (05.02 lc) what is the value of x? a right angle is shown divided into two parts. the measure of one part of the right angle is 10 degrees. the measure of the other part is 2x 20 40 45 85