Oscar and kim have $22 each to spend at a book fair. where all the student gets a 30% discount . they both want to purchase a copy of the same book, which normally sells for $28.50 plus 10% sales tax. to check if he has enough to purchase the book, oscar takes 30% of $28.50 and subtracts that amount from the normal price. and then computes 110% of the reduced price. is oscar correct? is kim correct ? do they have enough money to purchase the book?

Cor d? ? me ? max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

A50% increase followed by 33 1/2% decrease

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?