15kg of bronze was made by combining 10/kg of copper which costs $3/kg with 5kg of tin which costs $9/kg. Find the cost per kg of the mixture.

How many temperature in biratnagar

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.