15 points urgent
does anyone know how to solve this? if so, id like an explanation on how this is solved, and you.

given f(x)=2x+1 and g(x) =x^2+2x-1, find (f+g) (x) and find (f-g)(x). then evaluate the sum when x=2

( ps: i was also given this formula or something. not sure.)
sum: (f+g)(x)=f(x)+g(x)
difference: (f-g)(x)=f(x)-g(x)

Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?