An open box has to be made from a 16-inch by 30-inch cardboard piece by cutting out squares of equal size from the four corners and bending up the sides. What size should the squares be to obtain a box with the maximum possible volume?

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?