Help pls

Which expression can be used to find the difference of the polynomials? (10m – 6) – (7m – 4)

Drop in child care facilities are required to be licensed

Firms use marginal analysis to determine prices by a) changing prices in accordance with information from retailers. b) using comparisons with strong competitors to position prices accordingly. c) examining the effect on revenue of small changes to the price of one item. d) trying to minimize production costs by using better and more efficient methods.