I need help pleases and thanks

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 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?

Use the distributive law to multiply. 3(4x + 5y + 6)