a well-balanced scale ensures that if you place the same weight on both plates it will remain perfectly in balance. therefore, if in one of them you place 7 copper coins and 300 grams of rice, while in the other you place 5 copper coins exactly the same as the previous ones and 500 grams of seed, you observe that the scale remains in balance. how much weight is in the first plate?

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?

Sum is 17 and their difference is 3

A6 ounce bottle of dressing costs $1.56 a 14 ounce bottle costs $3.36 a 20 ounce bottle costs $5.60 which has the lowest cost per ounce