What led to the demise of early attempts to create a checking system? (Select all that apply.) looting and robbery
inability to verify the various forms of exchange
length of time to present bills for payment
bills were less secure to transport

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Place the following steps in order to complete the square and solve the quadratic equation,

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.