Hey help me please, and have a great day!!

Which rational number could be graphed between -4 and -5

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?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.