How many terms are in the expression 4+3x+2y-6xy

Plzzz asapppppp what is the inverse of f if f(x)=^3 sqrt x-5

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?