Bottles of sparkling water usually cost $1.69 each. This week they are on sale for 4 bottles for $5. You bought
one last week and one this week. Did you pay more or
less for the bottle this week? How much more or less?

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 these side lengths could form a triangle a) 2 cm , 2 cm , 4 cm b) 3 cm , 5 cm , 10 cm c) 3 cm , 4 cm , 5 cm d) 4 cm , 8 cm , 15 cm

Which expression is equivalent to 64 - 9x^2?