Which expression is equivalent to 12^4(x-3)(x+5)/30x(x+3)(x+5)

Can someone me and plz do the problem

X2 + y 2 = 36 x + y = 6 solve the system of equations.

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%