1+1. please help i cant get this answer :(

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 an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.