If x=12y, which expression represents 1x?

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters

The population of a bacteria colony grows by a consistent percentage each hour and can be modeled by the function y = 500(1.16)t. what does the value 500 represent in the function?