An exterminator (bug man) $35 to spray each room. If the total bill was $280, how many rooms were sprayed. Write and solve an equation to find the number of rooms sprayed by the exterminator.

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Solve for x and y a x= 13.3 y= 16.7 b x= 23.3 y= 12.5 c x= 7.5 y= 16.7 d x=7.5 y= 12.5

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?