Can y’all plz look at the pictures and read it and help me plz

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?

Negative 5 1/12 + negative 4 1/4 + 6 3/4

How can you construct perpendicular lines and prove theorems about perpendicular lines