Complete the square: a^2 - 2a - 8=0

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

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?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .