0.81 is 10 times as much as ? and 1/10 of?

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?

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)