Tallyn bought 4 pairs of shoes for 8$ a pair and spent 12$ on a video game. he paid for the shoes and video game using his debit card . the chang in the balance of serena's checking account can be represented by the expereshions shown

X+ y = 5 ; x - y =3 solve using linear combination

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.

Ineed with this problem 21 show steps