ginger noticed that no matter the height of the adjustable stand for her electric piano, the keyboard remains level and centered over the strand. what must be true about the legs of the stand? explain.

Find the sum of the following series. round to the nearest hundredth if necessary.

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?

Solve: 3x+y=6 4x-2y=18 show all work !