Which expression and value represents 100 less than 3 times the sum of 18 and 2

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?

Answer pls man im trying to get out of summer school

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?