-38 = -38 What algebraic equality property justifies the above statement?

transitive
division
symmetric
reflexive

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?

Which of the following best describes the delian problem?

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