Which of the following is the common difference and the nth term rule for the sequence: 5,−3,−11,…? Select one:
d=−8 and an=−8n+13
d=8 and an=8n+13
d=−7 and an=−7n+13
d=7 and an=7n+13

Math each whole number with a rational, exponential expression

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?

Formulate alisha has a number in mind. if she adds three to her number the result is less than five. use this information to write and solve an inequality about alisha's number. then graph the solution set.