X=17+(sqrt(2y)/2),x=17-(sqrt(2y)/2) i believe is the answer
Let x represent the amount to be added. The total amount of tin will be
15%·20 + 10%·x = 12%·(20+x)
(15%-12%)·20 = (12%-10%)·x
3%·20/2% = x
30 = x
30 pounds of 10% tin must be added to get a 12% mixture.
Answer:
r=8
Step-by-step explanation:
you divide 28 by 3 1/2 to get r=8
Answer:A
67,900,000
Step-by-step explanation:
