Determine which of the lines are parallel and which of the lines are perpendicular. Select all of the statements that are true. Line a passes through (-2,8) and (5,8).
Line b passes through (2,0) and (4,9).
Line c passes through (0,6) and (5, 26).
Line d passes through (0,8) and (4,7).

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

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?

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.