There are a total of 57 students in a chess club and a photography club. The photography club has 11 more students than the chess club. Write and solve the system of equations that represent
this situation to find the number of students in the chess club (x) and the number of students in
the photography club (y).

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

Now 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.

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?