Un químico cuenta con dos soluciones de ácido. Una contiene 15% de ácido puro y la otra 6 %. ¿Cuántos cm3 de cada solución debe usar para obtener 400 cm3 de una solución con 9 % de ácido?

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Using elimination, what is -4x+2y=-12 4x+8y=-24

Mike wants to make meatloaf. his recipe uses a total of 8 pounds of meat. if he uses a 3 to 1 ratio of beef to pork, how much pork will he use? enter your answer as a mixed number in simplest terms.