A square box is filled with two layers of identical square pieces of chocolate. Kirill had eaten all 20 pieces in the upper layer along the walls of the box, how many pieces of chocolate are left in the box?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

Find the nonpermissible replacement for binthis expression. b2/5b +5