Can someone help with 11-19 please extra points

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?

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry