Factorise
28ab^2-21ab^2

Abig remake 100 loaves of bread in one day how many loaves does the bakery make in 6 days

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

Anyone know these questions? i need ,.