Find the missing sides and leave answers as radicals in simplest form!! I need help

For the equation below, x is the input and y is the output. y = -4x + 3 if the input is -8, then the output is

What is the solution of sqrt x+2-15=-3

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?