Find the value of x in each case. give reasons to justify your solutions!

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.