D, E, and F are on sides BC, AC, and AB, respectively, of Triangle ABC such that DE║AB, DF║AC, and BC║EF. Prove that D, E, and F are the midpoints of the sides of Triangle ABC. Please help I desperately need help to understand this. Thank you! Whoever can help me I will give the Brainliest! Just pls help T^T

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?

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared