Help! what’s the area & formula?

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

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?

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.