PLEASE HELP ME ITS IXL

Abox of chocolates costs $7. which equation relates the number of boxes sold (x) and total cost of the boxes sold (y)?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.