Find out the real numbers m and n knowing that the systems: {x - y = 2
{2x + y = 7
and
{mx + 3y = 0
{2x + ny = 1
are equivalent (equal) ​

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. another supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which would you choose and how much would you save with that choice? show calculator try it! if you buy 1000 ml bags, how many do you need to buy each month? type your answer in the space provided and click on the check answer button.

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?