Sometimes when grouping symbols are use to enclose other grouping symbols, we use instead of parentheses or brackets, to make an expression easier to read.

Example: 2{(3 + 5)[2 −(4 + 5)] + 8

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

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?

Can you divide 25 into 4 equal groups? explain why or why not.