7) In a warehouse, boxes have been stacked in 4 layers as shown. The workers make other stacks according to the same pattern. If a stack has "n" layers, how many boxes are in the bottom layer? Write an expression.

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.