If you will? you! this is pre-calculus

Think of it that way

y = x^2 + a

y = x^2 + a > y = x^2 right ?

so adding a constant sifts up as y increases while subtracting one decreases it

so adding a constant with the x shifts right and left (add -> left , subtract -> right) 

8 down and 4 right 

Answer:

13.46

step-by-step explanation:

16.80 x .20 = 13.46