Eric sells shirts. it costs him $100 to buy all the shirts and $10 to print designs on the shirts. eric sells each shirt for $4. so far eric has sold 20 shirts. eric uses an equation to calculate his total profit.

what is the slope of the equation modeling this situation?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field