Typical tip percentages in restaurants is either 20% or 25% of the total bill. If a restaurant bill before tip costs $31.88, what would the tip be at 25%? [remember all money questions should be rounded to the nearest cent.]

Factor. 8x2y2 – 4x2y – 12xy 4(8x2y2 – x – 12xy) 4(2xy – 4x2y – 12xy) 4x2y2(2xy – xy –3) 4xy(2xy – x – 3)

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?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?