1) A quadrilateral has no pairs of parallel sides. What two shapes could it be?

Solve for x, y, and z. show all steps.

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

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?