Two linear equations are represented by using the tables below. the data points for equation a are plotted on the coordinate plane below and are connected by using a straight line. what is the solution to the system of equations? (–6, –4) (–5, –4) (–3, –2) (0, 1)

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?