Convert 99 degrees Fahrenheit to celsuis

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?

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

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.